TV Series That Went On For Way Too Long

The television landscape is filled with beloved programs that capture the attention of audiences for many years. Some series find the perfect moment to conclude their stories while others continue to air long after their primary narrative arcs have finished. Factors such as high viewership and financial success often lead networks to renew shows far beyond their initial creative scope. This can result in significant changes to the cast and a perceived decline in the quality of the writing. Exploring these long running series provides insight into the challenges of maintaining a consistent story over several decades.

‘The Simpsons’ (1989–Present)

This animated sitcom follows the lives of the Simpson family in the town of Springfield. It holds the record as the longest running American sitcom and has produced more than seven hundred episodes. The show uses satirical humor to explore a wide range of social and political topics through its colorful cast of characters. Many viewers point to a shift in quality following the conclusion of the ninth or tenth season. Despite the mixed reception of newer seasons ‘The Simpsons’ remains a staple of the television landscape.

‘Grey’s Anatomy’ (2005–Present)

This medical drama centers on Meredith Grey and her colleagues at a hospital in Seattle. The show follows the doctors as they progress from interns to senior surgeons while managing their personal relationships. Over several years the series has undergone numerous cast changes as original actors departed the project. It holds the record for the longest running primetime medical drama on American television. Fans of ‘Grey’s Anatomy’ often debate whether the numerous cast changes and evolving storylines have impacted the narrative consistency.

‘Supernatural’ (2005–2020)

Two brothers travel across the United States to hunt demons and other mythical creatures. The story originally focused on a search for their father before expanding into a battle between heaven and hell. ‘Supernatural’ lasted for fifteen seasons and became the longest running live action fantasy series in North America. The plot evolved from simple urban legends to complex cosmic conflicts involving various powerful entities. Some viewers felt the narrative changed significantly after the original creator left the show.

‘The Walking Dead’ (2010–2022)

This post apocalyptic series focuses on groups of survivors trying to stay alive during a zombie outbreak. The show began with a small group led by Rick Grimes and eventually expanded to cover multiple communities. It ran for eleven seasons and spawned several spin off series within the same universe. Changes in leadership and the departure of major characters led to shifts in the storytelling direction. Viewers and critics often debated the pacing of ‘The Walking Dead’ as it neared its conclusion.

‘Family Guy’ (1999–Present)

The animated sitcom depicts the lives of the Griffin family in the fictional city of Quahog. After an initial cancellation the series was revived and has continued for over twenty seasons. The show is known for its cutaway gags and dark humor targeting various aspects of pop culture. It has produced several hundred episodes and remains a central part of the adult animation block on television. Some viewers feel the humor in ‘Family Guy’ has become less effective over the many years of broadcast.

‘NCIS’ (2003–Present)

This procedural drama follows a team of special agents from the Naval Criminal Investigative Service. The team solves crimes involving the Navy and Marine Corps through forensic science and field investigation. ‘NCIS’ has aired for more than twenty seasons and resulted in multiple programs in different cities. The cast has seen significant changes including the departure of the original lead actor after many years. It remains one of the most watched scripted shows on broadcast television.

‘Law & Order: Special Victims Unit’ (1999–Present)

This crime drama focuses on the elite squad of detectives who investigate sexually based offenses. The series follows Captain Olivia Benson as she navigates complex cases and systemic challenges within the legal system. It is currently the longest running live action primetime series in the history of American television. Throughout its many decades on the air ‘Law and Order Special Victims Unit’ has addressed various social issues and cultural shifts. Many fans appreciate the longevity of the characters while others question the repetitive nature of the procedural format.

‘Modern Family’ (2009–2020)

This mockumentary style sitcom follows the lives of three diverse branches of the same family. The show was praised for its humor and heart during its early seasons and won numerous awards. It ran for eleven seasons and depicted the children growing into adulthood while the adults faced new life stages. Critics noted that the later seasons struggled to find fresh storylines for the large ensemble cast. The series concluded with a final season that aimed to provide closure for every family member.

‘The Big Bang Theory’ (2007–2019)

The sitcom centers on a group of socially awkward scientists and their aspiring actress neighbor. It became one of the most popular shows on television and ran for twelve seasons. The narrative focus expanded as the main characters got married and started families of their own. While the show maintained high ratings some fans felt the original charm of the character dynamics had shifted. ‘The Big Bang Theory’ ended its run as the longest running multi camera sitcom in history.

‘Shameless’ (2011–2021)

This series follows the dysfunctional Gallagher family as they navigate life on the South Side of Chicago. The show ran for eleven seasons and explored themes of poverty and addiction through dark comedy. Over the course of the run the children grew up and faced various personal struggles while their father remained a source of trouble. Many viewers felt the narrative lost focus after several major characters left ‘Shameless’ in later seasons. It concluded its run as the longest running original scripted series in the history of the network.

‘Dexter’ (2006–2013)

A forensic technician leads a double life as a vigilante serial killer who targets other criminals. The show gained critical acclaim during its early seasons for its unique premise and complex protagonist. After eight seasons the series ended with a finale that received significant criticism from the audience. A limited revival was eventually produced to provide a different conclusion to the story of the main character. Discussions regarding ‘Dexter’ often highlight the perceived decline in writing quality during the final years.

‘Lost’ (2004–2010)

The survivors of a plane crash are forced to work together on a mysterious tropical island. What began as a survival drama quickly evolved into a complex science fiction story involving time travel and supernatural elements. The show ran for six seasons and became famous for its use of flashbacks and intricate mysteries. Many fans felt the increasing complexity of the plot made ‘Lost’ difficult to follow in the later years. The conclusion of the series remains a highly debated topic among television enthusiasts.

‘Two and a Half Men’ (2003–2015)

This sitcom originally centered on a jingle writer and his uptight brother living in a beach house. The show underwent a major transition when the original lead actor was replaced by a new character after the eighth season. It continued for four more seasons following the cast change and reached a total of twelve years on the air. Critics and viewers often noted a shift in the comedic style and dynamic of ‘Two and a Half Men’ during its final seasons. Despite the changes the series maintained high viewership throughout much of its long broadcast history.

‘How I Met Your Mother’ (2005–2014)

A father tells his children the story of how he met their mother through a series of lengthy flashbacks. The show spanned nine seasons and focused on the lives of five friends living in New York City. While the early seasons were praised for their innovative storytelling the later years faced criticism for stretching out the central mystery. The final season took place entirely over one wedding weekend which some viewers found to be a slow pace for ‘How I Met Your Mother’ episodes. The eventual reveal in the finale remains a controversial moment in sitcom history.

‘Once Upon a Time’ (2011–2018)

Characters from various fairy tales are transported to a small town in Maine where their memories are erased. The series blended fantasy elements with modern drama as the characters fought to break a powerful curse. It ran for seven seasons and expanded its mythology to include numerous literary figures. After many original cast members departed at the end of the sixth season the show underwent a soft reboot for its final year. Many fans felt the story of ‘Once Upon a Time’ had reached a natural conclusion before the final season began.

‘Glee’ (2009–2015)

High school students join a show choir where they deal with social issues and personal relationships through musical performances. The series became a cultural phenomenon during its early seasons and produced several hit songs. Over six seasons the show saw many characters graduate and move to different cities which split the narrative focus. Critics noted that the tone became increasingly inconsistent and the plots more outlandish as the show progressed. By the time ‘Glee’ concluded many felt the initial energy and charm of the program had diminished.

‘Pretty Little Liars’ (2010–2017)

Four friends are harassed by a mysterious figure known as A after the disappearance of their group leader. The show relied on intricate mysteries and secrets that kept viewers guessing for seven seasons. As the series continued the plot became more convoluted with multiple reveals and twists regarding the identity of the antagonist. A five year time jump occurred in the later seasons to transition the characters into adulthood. Some fans argued that the central mystery of ‘Pretty Little Liars’ was extended far beyond its original potential.

‘The Vampire Diaries’ (2009–2017)

A teenage girl becomes involved with two vampire brothers in a town filled with supernatural history. The show ran for eight seasons and explored various mystical conflicts involving witches and werewolves. Following the departure of the lead actress after the sixth season the narrative focus shifted to the remaining characters. The series eventually led to several programs that expanded the fictional universe. Many viewers felt the later seasons of ‘The Vampire Diaries’ struggled to replicate the tension and chemistry of the early years.

‘Empire’ (2015–2020)

A hip hop mogul must choose a successor for his massive entertainment company among his three sons. The drama gained massive popularity for its music and intense family rivalries during its first few seasons. It ran for six seasons and featured numerous guest stars from the music industry. The show faced behind the scenes challenges and declining ratings as the plot grew more sensational. ‘Empire’ concluded with an ending that many viewers felt was rushed due to external circumstances.

‘True Blood’ (2008–2014)

Vampires live openly among humans in a small Louisiana town after the invention of synthetic blood. The series based on a popular book franchise explored themes of prejudice and identity through a supernatural lens. It aired for seven seasons and introduced a wide array of creatures including fairies and shapeshifters. As the show progressed the storylines became more campy and fragmented among the large ensemble cast. Critics often pointed to the later seasons of ‘True Blood’ as a departure from the grounded nature of the beginning.

‘Prison Break’ (2005–2017)

A man intentionally goes to prison to help his brother escape before his execution. The first season was highly acclaimed for its tension and intricate planning. The show ran for four seasons before being cancelled and then returned for a fifth season several years later. Many viewers felt the premise was difficult to sustain once the characters were no longer in prison. The later seasons of ‘Prison Break’ moved into conspiracy theories and international espionage.

‘Heroes’ (2006–2010)

Ordinary people across the globe discover they have superhuman abilities and must work together to save the world. The first season was a massive critical and commercial success that influenced the superhero genre on television. The show struggled to maintain its momentum during the subsequent three seasons due to various creative shifts. Fans often noted that the large cast and complex plotlines became difficult to manage. Despite its short run compared to others many critics argue that ‘Heroes’ lasted longer than its narrative could support.

‘Smallville’ (2001–2011)

This series explores the youth of Clark Kent before he officially becomes the iconic superhero Superman. It ran for ten seasons and followed Clark as he discovered his powers and faced various villains in his hometown. The show eventually moved the setting to Metropolis and introduced other members of the Justice League. While the early years focused on coming of age themes the later seasons became more focused on traditional superhero tropes. Some viewers felt ‘Smallville’ delayed the inevitable transformation of its main character for too long.

‘ER’ (1994–2009)

The fast paced medical drama depicts the lives of the doctors and nurses at a busy emergency room in Chicago. It was a dominant force on television for many years and launched the careers of several major stars. The series lasted for fifteen seasons and saw a complete turnover of the original main cast. As the show progressed the storylines became more dramatic and focused on large scale disasters. Many critics believe ‘ER’ continued well past its creative peak despite its historical importance.

‘CSI: Crime Scene Investigation’ (2000–2015)

A team of forensic investigators uses physical evidence to solve murders in Las Vegas. The show popularized the forensic procedural genre and led to a massive franchise with multiple spin off series. It ran for fifteen seasons and featured several different lead actors throughout its history. The repetitive nature of the format became a point of discussion for critics over the many years of broadcast. ‘CSI Crime Scene Investigation’ eventually concluded with a television movie to wrap up the long running series.

‘Bones’ (2005–2017)

A forensic anthropologist and an FBI agent partner together to solve crimes by examining human remains. The show focused on the professional and romantic chemistry between the two lead characters over twelve seasons. It maintained a consistent audience by blending procedural elements with lighthearted character interactions. Some fans felt the series reached a natural conclusion several years before the final season aired. ‘Bones’ remains one of the longest running procedural dramas of its era.

‘Criminal Minds’ (2005–Present)

An elite team of FBI profilers analyzes the countrys most dangerous criminal minds to anticipate their next moves. The series has aired for more than fifteen seasons and underwent a revival shortly after its initial conclusion. Over the years the cast changed significantly as several original members left the program. The show is known for its dark tone and focus on the psychological motivations of offenders. Many viewers believe the formula of ‘Criminal Minds’ became repetitive after so many years on the air.

‘House’ (2004–2012)

A brilliant but misanthropic doctor leads a team of diagnosticians at a teaching hospital. The show focused on medical mysteries and the complex personality of the main character for eight seasons. While the early seasons were praised for their writing the formulaic approach became more apparent in later years. The series attempted to refresh the cast several times to maintain interest in the procedural elements. Critics often noted that ‘House’ struggled to find new ways to challenge its protagonist as the show neared its end.

‘Scrubs’ (2001–2010)

The medical comedy follows the lives of interns and residents at a fictional teaching hospital. It was known for its fast paced humor and surreal daydream sequences during its initial run. The show originally ended its story after eight seasons but was brought back for a ninth season with a new cast. Most fans and critics felt the final season of ‘Scrubs’ was a significant departure from the quality of the earlier years. The revival focused on medical students and failed to capture the magic of the original ensemble.

‘Weeds’ (2005–2012)

A widowed mother starts selling marijuana to support her family in an affluent suburban neighborhood. The show began as a satire of suburban life before the characters were forced to leave their home. It ran for eight seasons and saw the family move to several different locations as they became more involved in the drug trade. Many viewers felt the series lost its identity once it moved away from the original suburban setting. ‘Weeds’ concluded its run with a jump into the future to show where the characters ended up.

‘Californication’ (2007–2014)

A troubled novelist struggles to balance his career with his complicated personal life in Los Angeles. The show ran for seven seasons and focused on the hedonistic lifestyle and various relationships of the protagonist. While the early seasons received praise for their sharp writing the plot became more circular as the series continued. Critics argued that the main character failed to experience meaningful growth over the many years of the show. ‘Californication’ maintained a dedicated following but many felt the story had been exhausted.

‘Nip/Tuck’ (2003–2010)

Two plastic surgeons operate a successful practice while dealing with their own turbulent personal lives. The series was known for its graphic depictions of surgeries and increasingly sensational plotlines. It ran for six seasons and moved its setting from Miami to Los Angeles during the later years. As the show progressed the stories became more outlandish and polarized both critics and audiences. Many felt ‘Nip/Tuck’ had moved too far away from its original premise by the time it reached its finale.

‘Suits’ (2011–2019)

A brilliant college dropout with a photographic memory begins working as a law associate despite never attending law school. The show focused on his mentorship and the secret of his lack of credentials for nine seasons. The narrative underwent a major shift when two of the main cast members departed after the seventh season. While ‘Suits’ introduced new characters to fill the void some fans felt the original dynamic was missing. The series remains popular on streaming platforms long after its original broadcast ended.

‘The Office’ (2005–2013)

This mockumentary style sitcom depicts the everyday lives of office employees at a paper company in Scranton. It became a massive hit and ran for nine seasons on broadcast television. The departure of the lead actor during the seventh season marked a significant turning point for the series. Many viewers felt the show struggled to maintain its comedic quality without the original central character. Despite the mixed reception of the later years ‘The Office’ remains one of the most beloved sitcoms in history.

‘That ’70s Show’ (1998–2006)

A group of teenage friends grows up in a fictional Wisconsin town during the late nineteen seventies. The show ran for eight seasons and captured the fashion and culture of the decade through a comedic lens. The final season saw the departure of two core cast members and the introduction of a new character that was poorly received. Fans often point to the final year as a significant drop in quality for ‘That ’70s Show’ overall. The series concluded as the characters finally reached the first day of the nineteen eighties.

‘Roseanne’ (1988–2018)

This sitcom focused on a working class family in Illinois and was praised for its realistic portrayal of everyday struggles. The original run lasted for nine seasons before the show was revived for a tenth season decades later. The original ninth season was widely criticized for a plot twist involving a lottery win that changed the shows tone. While the revival was initially successful it faced behind the scenes issues that led to its cancellation and a subsequent spin off. Many critics argue that the original show should have ended before the controversial ninth season.

‘American Horror Story’ (2011–Present)

Each season of this anthology series focuses on a different horror theme and set of characters. The show has explored haunted houses and asylums as well as cults and apocalypse scenarios. It has aired for more than twelve seasons and features a recurring cast of actors in new roles. While early seasons were highly acclaimed some viewers feel the later entries have become too focused on style over substance. ‘American Horror Story’ continues to be a major part of the television landscape with regular renewals.

‘South Park’ (1997–Present)

The animated series follows four young boys in a small town in Colorado and is known for its crude humor. It has been on the air for over twenty five seasons and remains famous for its quick production turnaround. The show often satirizes current events and pop culture figures shortly after they make headlines. Some viewers believe the shift toward serialized storytelling in later years changed the feel of the program. Despite the length of the run ‘South Park’ continues to produce new episodes and specials.

‘SpongeBob SquarePants’ (1999–Present)

This animated series depicts the adventures of a sea sponge and his friends in the underwater city of Bikini Bottom. It has become one of the most successful franchises in animation history and has aired for over twenty years. The show has produced several hundred episodes along with multiple movies and spin off programs. Many fans of the early seasons believe the humor and writing style shifted after the original creator stepped away. ‘SpongeBob SquarePants’ remains a dominant force in childrens programming and popular culture.

‘Riverdale’ (2017–2023)

This drama series provides a dark and subversive take on the classic Archie Comics characters. The show began as a murder mystery in a small town before evolving into increasingly bizarre and supernatural storylines. It ran for seven seasons and became well known for its unpredictable plot twists and musical episodes. Critics and viewers often commented on how far the narrative strayed from its initial premise as the show progressed. The final season featured a major time jump and a shift in setting that polarized the audience of ‘Riverdale’ until the end.

‘Elite’ (2018–2024)

Three working class students enroll in an exclusive private school in Spain which leads to conflict and murder. The show used a flash forward structure to build tension around various crimes over eight seasons. As the series continued the original cast was almost entirely replaced by new generations of students. Critics noted that the plot became increasingly focused on shock value and sensationalism in the later years. Many felt that ‘Elite’ had exhausted its premise several seasons before the final episode aired.

‘The Flash’ (2014–2023)

A forensic scientist gains the power of super speed and becomes a superhero protecting Central City. The series was a major part of a larger superhero universe and ran for nine seasons. It explored complex themes of time travel and alternate realities as the protagonist faced numerous powerful villains. Over the years the show saw a revolving door of supporting characters and increasingly complicated plot arcs. Many fans felt the quality of the visual effects and writing declined as ‘The Flash’ neared its conclusion.

‘Arrow’ (2012–2020)

A billionaire returns home after being stranded on a desert island to fight crime as a secret vigilante. The show ran for eight seasons and launched a massive interconnected universe of superhero programs. It balanced gritty street level action with larger comic book elements as the cast of heroes expanded. Some viewers argued that the middle seasons suffered from repetitive character conflicts and less compelling antagonists. ‘Arrow’ eventually concluded by tying together various storylines from across its long history on television.

‘One Tree Hill’ (2003–2012)

Two half brothers compete for positions on their high schools basketball team while navigating complicated family lives. The show ran for nine seasons and followed the characters from high school through their adult years. A significant time jump occurred after the fourth season to move the story four years into the future. Following the departure of two main leads after the sixth season the narrative focus shifted to the remaining ensemble. Many fans felt ‘One Tree Hill’ should have concluded when the original central characters left the show.

‘Beverly Hills, 90210’ (1990–2000)

A group of friends navigates life and relationships while attending high school and college in an affluent California neighborhood. The series was a massive cultural phenomenon during the nineties and ran for ten seasons. It addressed various social issues of the time through the perspectives of its teenage and young adult characters. The cast underwent significant changes as original members departed and new characters were introduced to maintain the drama. Critics often pointed to the later seasons of ‘Beverly Hills 90210’ as being less impactful than the early years.

‘7th Heaven’ (1996–2007)

This family drama centers on a minister and his wife as they raise their seven children in a small town. The show ran for eleven seasons and focused on moral lessons and the challenges of growing up. It was a consistent ratings success and became the longest running series in the history of its original network. Many viewers felt the storylines became increasingly redundant as the children grew older and faced similar issues. The series was briefly cancelled before being brought back for one final season that many felt was unnecessary.

‘Charmed’ (1998–2006)

Three sisters discover they are powerful witches known as the Charmed Ones who must protect the innocent from evil. The series ran for eight seasons and blended supernatural elements with family drama. It underwent a major cast change after the third season when one of the sisters was replaced by a long lost half sister. While the show maintained a loyal following some fans felt the later seasons became too focused on campy humor and less on the original mythology. ‘Charmed’ remains a popular cult classic long after its final episode aired.

‘The Blacklist’ (2013–2023)

A high profile criminal surrenders to the FBI and offers to help them catch other dangerous fugitives. The series relied on the mysterious connection between the criminal and a young profiler for ten seasons. After the lead actress departed at the end of the eighth season the show continued for two more years. Many viewers felt the central mystery was stretched out for too long without providing satisfying answers. ‘The Blacklist’ concluded its run with a series finale that received a mixed response from its dedicated fanbase.

‘Hawaii Five-0’ (2010–2020)

A specialized police task force investigates major crimes across the islands of Hawaii. This reboot of the classic series ran for ten seasons and was known for its action sequences and scenic locations. The cast saw significant changes in the later years as several original members left due to various reasons. Some critics felt the procedural format of ‘Hawaii Five O’ became formulaic over the course of its long run. Despite the changes the show remained a steady performer for the network until its conclusion.

‘Blue Bloods’ (2010–2024)

This multi generational drama follows a family of police officers and legal professionals in New York City. The show is known for its weekly family dinner scenes where the characters discuss various moral and legal dilemmas. It has aired for fourteen seasons and maintained a consistent audience throughout its long tenure. Many viewers appreciate the traditional procedural format while others feel the stories have become repetitive after so many years. ‘Blue Bloods’ will conclude its run as one of the most successful police dramas in television history.

Tell us which long running show you think should have ended sooner in the comments.