Is there a Silo season 3? Cast, expected release time and plot explored

Silo season 3 is an American science fiction dystopian drama television show created and showrun by Graham Yost. Shift, the second book in Hugh Howey's trilogy, is adapted for the show, which uses two timelines to examine the silo system's beginnings and, despite book variations, Juliette's involvement is interwoven throughout.  

An exact premiere date has not yet been established, but most estimations suggest a late 2025 or early 2026 debut, even though filming concluded in mid-2025 and the show has been formally renewed. In December 2024, Apple formally extended Silo for Seasons 3 and 4, ensuring the trilogy's full adaptation.

The show explores the beginnings of the silo project, showing how the CAD-FAC initiative, a doomsday shelter for nuclear fallout, was used to build the underground community. The story examines the fate of the unfortunate occupants of Silo 17 as well as the involvement of journalist Helen (Jessica Henwick) and Georgia Congressman Daniel (Ashley Zukerman) in this scheme. In the meantime, Common, Harriet Walter, Avi Nash, Chinaza Uche, Remmie Milner, and the rest of the returning ensemble cast, along with Juliette Nichols (Rebecca Ferguson), are still dealing with the aftermath from the Season 2 cliffhanger in which Bernard and Juliette were trapped in a flaming airlock.

The show consists of two seasons and 20 episodes, each lasting between 41 and 62 minutes, and is liked by critics and audiences alike. On the film and television rating website Rotten Tomatoes, Silo has been certified 90% ‘fresh,’ while the audience score stands at 66%.

Where to Watch Silo season 3

That's a wrap on Season 3.#Silo Season 1 & 2 — Now Streaming pic.twitter.com/thv483v6yO

— Apple TV (@AppleTV) May 2, 2025

Silo season 3 will stream exclusively on Apple TV+ in the United States. with the introduction of Seasons 1 and 2. Access to the whole library of shows is provided via Apple TV+, with Seasons 1 and 2 being instantly streamed.

American viewers can watch by subscribing to Apple TV+ through the official website or app. Ad-free streaming, Ultra HD (4K) access, offline viewing, and compatibility for up to six devices via Apple's Family Sharing feature are all included in the current $9.99/month (or $99.99/year) price.

Before billing starts, new customers can try the service for free for seven days. Students can also get extended free access through Apple Music student subscriptions, and new Apple device buyers frequently get three months free. 

All content is available with this one-plan membership, including original seasons, sci-fi debuts like Silo, and core dramas. New episodes of Silo Season 3 can be streamed without any further add-ons.

Exploring the plot of Silo season 3

In season 3 of Silo, showrunner Graham Yost begins adapting Hugh Howey’s second novel, Shift - shifting the narrative into dual timelines: modern-day Silo 18 and critical pre-apocalyptic flashbacks regarding the development of the silo system. The season focuses into mysterious mechanisms like the "Safeguard" and fertility issues connected to The Pact, as well as the beginnings of Silo 17, exposing what actually transpired when inhabitants went outside. In contrast to previous seasons, Sunlight makes a comeback with outside sequences in bright light, which breaks the franchise's signature subterranean gloom.

Two important new characters are journalist Helen (Jessica Henwick) and Congressman Daniel (Ashley Zukerman), who were promoted from their Season 2 roles to full-series regulars. The majority of the original cast, including Rebecca Ferguson as Juliette, is back. Season 3 has already been recorded and is expected to air in late 2025 or early 2026.

Cast of Silo season 3

Armed and dangerous.#Silo Season 1 & 2 — Now Streaming pic.twitter.com/LyUAIJzAJe

— Apple TV (@AppleTV) June 14, 2025

In Silo season 3, the majority of the core cast returns, with Rebecca Ferguson as engineer Juliette Nichols, who is now at the center of power struggles in both silos. Harriet Walter plays the grounded electrical engineer of the silo, Martha Walker, while Common reprises his role as security chief Robert Sims.

Chinaza Uche returns as the watchful chief deputy Paul Billings; Steve Zahn as Jimmy Conroy (Solo); Rick Gomez as Patrick Kennedy; Remmie Milner as Shirley Campbell; Shane McRae as Knox; Clare Perkins as Carla McLain; Avi Nash as Lukas Kyle, the systems analyst; Alexandria Riley as Camille Sims; and Billy Postlethwaite as Deputy Hank. 

Jessica Henwick, who portrays Helen, a persistent pre-collapse journalist whose archives could reveal the secrets of the silos, and Ashley Zukerman, who plays Daniel, a determined U.S. congressman connected to the silo's initial blueprint, are new series regulars.

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