Common and Alexandria Riley Break Down the Sims Family’s Shifting Power in ‘Silo’ Season 3

‘Silo’ has returned to Apple TV, and this time the Sims family sits at the center of the story rather than on its edges. Season 3 puts Robert and Camille Sims right in the middle of Silo 18’s most dangerous changes so far, with the pair no longer just part of the system but now key players inside it.

That shift reshapes nearly everything about how the couple functions on screen. Their roles split after Bernard steps away, with Robert becoming the IT shadow and Camille chosen by the Algorithm as the new Head of IT, a division that forces the family in different directions once Robert and their son Anthony are sent out of the vault while Camille stays behind to serve the system.

The Sims Family Power Struggle Takes a New Shape

The marriage between Robert and Camille has always carried tension, but season three pushes it further than before. In Season 2, the pair often seemed to understand each other in ways few other people could, ambitious and strategic and deeply invested in their family’s future, even if their choices made it difficult to call them sympathetic in any traditional sense.

That dynamic changes once real power enters the picture. Season 3 puts the relationship under a different kind of pressure, and the question stops being whether Robert and Camille want power and becomes what power does to them once they are close enough to feel its full weight.

Common and Riley described that shift differently for each character. Riley said she approached Camille as someone who is changed by power, with the responsibility becoming all consuming and narrowing her focus until it begins to disconnect her from the person who has always been her partner. Common’s answer took Robert in the opposite direction, describing him as stripped of power in some ways even as he gains access to a deeper truth, so that truth becomes its own kind of power for a man who spent so long believing the version handed down by Judicial and IT.

That contrast has become one of the more discussed threads of the new season. Camille is carrying a crushing responsibility, Robert is questioning whether the source of that responsibility should be trusted at all, and in the middle of it all there is still a marriage, a family, and a son they both love.

Robert and Camille Sims’ Relationship Under Pressure

For all the political maneuvering, both actors kept returning to the idea that trust is what actually holds the Sims marriage together. According to the pair, the foundation of their partnership is something surprisingly simple, trust, and Robert and Camille have long operated as one of the strongest partnerships in the entire show even when their ambitions raised eyebrows, Riley told The TV Cave.

Small, quiet choices carried a lot of that weight during filming. Riley wanted audiences to understand that the couple’s loyalty to each other remained at the center of every decision, and the actors worked closely with directors to find opportunities for shared smiles and subtle gestures that explained why the characters have stayed together so long.

Common pointed out that many of their scenes work on two levels at once, since the dialogue may focus on the politics of the silo while the real conversation underneath is about doubt and understanding between husband and wife, saying “It’s relationship stuff underneath.”

The pressure of the new season also plays out physically, with Camille learning to work the levers of a job Robert used to hold. Camille is now tied directly to the Algorithm that controls the silo’s decisions, while Silo 18 deals with the fallout of a rebellion and fears about a hidden Safeguard procedure that could wipe out everyone inside. Riley described the dynamic between Camille and Juliette as full of manipulation and gameplaying, noting that Juliette is a threat to both Camille and Robert, which makes every interaction between them unpredictable.

Camille’s Rise as Head of IT Changes the Story

Camille’s promotion has turned her from a supporting figure into one of the season’s defining characters. As Robert’s wife and the mother of his child, Camille has traditionally been something of a background observer, occasionally used as an emotional device for Robert’s arc, but continuing off the Season 2 finale she is now Head of IT and a thorn in Juliette’s side.

That new authority has not made her more sympathetic. Camille Sims, now the head of IT replacing Bernard, is no better than her predecessor, and viewers come to dislike her over the course of the season as she makes increasingly extreme and lethal decisions with little regard for the consequences to her family or the people of the silo.

Reviewers have singled out Riley’s performance as one of the season’s strongest elements. With Sims and Bernard no longer the primary antagonists, Camille becomes the new villain of the piece, torn between love for her family and duty to the silo, and she effectively steals the entire season.

Robert, meanwhile, is left holding the emotional pieces at home. Common pointed to an early scene in which Robert comforts his son during a blackout as evidence of a more personal side to the character that fans had only glimpsed before, and said he deliberately chose not to read too deeply into the show’s past events, since Robert Sims would not know that information either.

The Silo Season 3 Cast and What Comes Next

The season leans on a returning ensemble alongside new arrivals from its expanded timeline. Common returns as Judicial enforcer Robert Sims alongside Harriet Walter, Chinaza Uche, Avi Nash, and Steve Zahn, with Alexandria Riley’s Camille Sims becoming increasingly pivotal as tensions rise within the silo. The ten episode third season debuted on Apple TV on July 3, with new episodes following every Friday through September 4.

The season also splits its focus between the present day story and a newly introduced past. Season 3 is divided between two timelines, the present continuing the story audiences already know and the past set 350 years before the silos, revealing why they were built and what happened before the end of the world. ‘Silo’ was renewed for both a third and a fourth, final season back in December 2024.

Early reviews suggest the new structure has paid off. Rotten Tomatoes reported a 100 percent approval rating with an average score of 8.6 out of 10 based on eleven critic reviews for the third season, while Metacritic assigned it a score of 85 out of 100 based on four critics, indicating universal acclaim.

With Robert and Camille’s marriage now caught between duty, memory, and a son they both love, ‘Silo’ has turned its most stable partnership into its most volatile one, and it’s worth asking which of the two Sims parents viewers will find themselves rooting for as the season unfolds.