Silo season 3 is finally here, expanding the hit sci-fi mystery beyond the underground bunkers and into the shocking origins of humanity’s survival.
Premiering on Apple TV on July 3, 2026, the new season follows Juliette Nichols‘ fight to survive while introducing a parallel story set in the “Before Times,” revealing how the silo system first came to exist. As a result, the new season features an expanded ensemble, joined by new series regulars, alongside several familiar faces.
Highlights
- Meet the returning and new faces driving Silo season 3’s biggest mysteries.
- Discover who’s joining Juliette as the story expands beyond the underground.
- Here’s the complete cast bringing season 3’s dual timeline to life.
Here’s the complete cast of Silo season 3, along with the characters shaping its biggest chapter yet.
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Silo season 3: Returning main cast
Rebecca Ferguson as Juliette Nichols
Juliette is an engineer who finds herself at the center of a massive political conspiracy that can unravel the truth behind the silos.In the previous season, Juliette ventured outside the silo and ultimately found herself trapped inside Silo 17 after surviving the hazardous environment.
When season 3 picks up, Juliette is dealing with memory loss as she once again searches for answers about the true nature of silos. Ferguson is best known for playing Ilsa Faust in the Mission: Impossible films and Lady Jessica in the Dune franchise.
Common as Robert Sims
Image credits: Apple TV
Initially, the head of Judicial Security, Robert, becomes increasingly influential within the silo’s power structure. In season 3, he rises to the position of a judge, acting as a reformer to gain the people’s trust.
Common rose to fame as a rapper, but the Grammy-winning musician later transitioned to acting. His past credits include hit shows such as The Chi and Never Have I Ever. He also appeared as Cassian in John Wick: Chapter 2.
Steve Zahn as Jimmy Conroy/Solo
Image credits: Apple TV
Introduced in season 2, Solo is the long-isolated survivor of the rebellion in Silo 17 who becomes an important ally to Juliette. He possesses vital knowledge about surviving outside the silo and the environmental hazards surrounding it.
Zahn is known for roles on shows such as Modern Family, Mad Dogs, and Treme. He played Mark Mossbacher in season 1 of The White Lotus and Jake Hudson in Chad Powers.
Alexandria Riley as Camille Sims
Image credits: Apple TV
Camille is Robert’s wife, a former Raider who slowly gains political influence in season 2. She is also one of the few individuals with ties to the mysterious Algorithm.
By the start of season 3, she is actively misleading Juliette about her past escape and suppressing her memories with pills.
The Welsh actress rose to prominence with her performance as Natalie Tucker in The Tuckers. Viewers might also recognize her as Detective Culver from the hit Netflix series Baby Reindeer.
The rest of the returning main cast
Image credits: Apple TV
- Harriet Walter as Martha Walker, a reclusive repair expert who becomes Juliette’s emotional anchor.
- Avi Nash as Lukas Kyle, a curious IT analyst who discovers The Algorithm.
- Rick Gomez as Patrick Kennedy, a former black market expert and relic smuggler.
- Chinaza Uche as Paul Billings, the chief deputy dealing with a secret tremor condition.
- Shane McRae as Knox, an influential rebellion leader from the lower levels.
- Remmie Milner as Shirley Campbell, Juliette’s engineer friend who joins Knox’s efforts.
New cast & characters for Silo season 3
Ashley Zukerman as Daniel Keene
Image credits: Apple TV
Daniel is a U.S. congressman from Georgia who was introduced in the season 2 finale. At the start of season 3, he navigates a secret committee investigating a dirty strike on Iran that is implied to have ties to the creation of the silos.
Zukerman played the lead role of Robert Langdon in the short-lived adaptation of Dan Brown’s The Lost Symbol. He also appeared as Peter MacLeish in Designated Survivor.
Jessica Henwick as Helen Drew
Image credits: Apple TV