‘Lanterns’ Explains Hal Jordan’s Sentry Protocol And What It Means For John Stewart’s New Ring

‘Lanterns’ has spent its first half season building a slow burn mystery around Hal Jordan and John Stewart, and episode five finally gave fans a new piece of Green Lantern technology to talk about. The sentry protocol, a ring feature never shown before in the series, became a key plot device in an episode that reshaped the entire season.

The reveal came at a moment when Hal needed backup he could not physically provide himself, and the show used the feature to raise questions about identity, duty, and what happens when a hero starts losing his grip on both.

Green Lantern Sentry Protocol Explained

In episode five, Hal deploys a feature of the Green Lantern ring that had not been shown before, called the sentry protocol, which creates an identical hologram of Hal for investigation and decoy purposes. While watching over the town of Rushville from a water tower, Hal activates the protocol and sends out what fans have nicknamed the Halogram to investigate a developing threat.

The hologram copy is not always visibly walking around or active, but it still proves useful to Hal as he works to locate Zoe and eliminate the Manhunter threatening the town. The mechanic gives the show a new visual language for how Hal operates when he is stretched too thin to be everywhere at once.

The scene also carries larger implications for the DC Universe, since it offers a way for Kyle Chandler’s version of Hal Jordan to potentially return to the story in some form even after his death was revealed in the pilot episode. That detail matters given how firmly the DCU has treated character death as permanent under its current creative leadership.

Critics have already flagged the Halogram as one of the more intriguing elements introduced in the episode, suggesting the show has room to explore the dynamic between Hal and his hologram counterpart further as the season continues. It is a small piece of world building that opened up a much bigger conversation about where Hal’s story goes from here.

Hal Jordan’s Ring And The Fight For Control

Episode five, titled Lights Out, was directed by Geeta Vasant Patel and written by Justin Britt-Gibson, and it packed more action into its 51 minutes than the first half of the season combined. By the closing minutes, Hal Jordan was no longer Earth’s Green Lantern.

Hal ends up trapped beneath rubble from his destroyed motel room, and his former trainee John Stewart pries the ring from his fingers before Hal weakly asks him, was it worth it. John does not answer him directly in that moment.

Instead, John delivers his response to one of the Guardians, a character named Lianna, telling her that he spent a lot of his life imagining what it would feel like to wear the ring. The line lands as the emotional center of the episode after four episodes of rivalry between the two men.

John Stewart, played by Aaron Pierre, acquires the ring by beating Hal Jordan, played by Kyle Chandler, nearly to death in the motel room while an alien attacker fires on Rushville from orbit. It is not the ceremonial passing of the torch that either man might have pictured.

John Stewart Becomes The New Green Lantern

John explains his decision by pointing out that Hal betrayed everything to keep the ring, and that it broke him to the point where he probably does not even remember why he wanted it in the first place. Rather than putting the ring on and reciting the oath, John hands it back to the Guardian and walks away.

Throughout the confrontation, Hal insists that the ring chose him, that the Guardians are manipulative, and that if they can strip the power from him, they could just as easily do the same to John. The exchange reframes the entire season as less about who deserves the ring and more about what the ring actually represents.

The episode plays almost like a season finale arriving three episodes early, complete with explosions, alien invaders, betrayals, and several character deaths. That pacing choice appears to have been deliberate, closing out the 2016 timeline mystery while opening new questions for the back half of the season.

With the Manhunter storyline resolved and three episodes still remaining, the show has signaled there is plenty more to explore in Rushville and beyond. The door remains open for Hal, and for the Halogram, to factor into whatever comes next.

Critical Reaction To Lanterns Episode 5

One review called the episode the best hour of superhero television this year, describing it as explosive, action packed, deeply moving, and genuinely shocking. That same review noted the episode portrays a Hal Jordan who has lost himself, clinging to the ring even after forgetting why he cared about it in the first place.

Reaction has not been universally glowing. One reviewer questioned why the show has struggled to make its central mystery land emotionally, while still praising Kyle Chandler as the breakout performer of the series and Aaron Pierre as a solid, stoic counterpart.

That reviewer also singled out the supporting cast, including Poorna Jagannathan, Kelly Macdonald, and Garret Dillahunt, as strong contributors even when the broader story left them wanting. The split reaction suggests ‘Lanterns’ is generating real conversation even where critics disagree on execution.

The series stars Kyle Chandler as Hal Jordan and Aaron Pierre as John Stewart, and premiered in August 2026 on HBO and HBO Max as part of the DC Universe’s Chapter One, Gods and Monsters phase. It was created by Chris Mundy, Damon Lindelof, and Tom King.

The sentry protocol may have started as a small technical detail, but it has already reshaped how fans think about Hal Jordan’s fate and whether Kyle Chandler’s version of the character has truly left the show for good. With John Stewart handing the ring back rather than claiming it outright, viewers are left to wonder who wears it next, and what role the Halogram plays in getting them there.