Silo bosses reveal teaser for season 4 following dramatic season 3 finale
It was shot back-to-back with season three
Last updated 16 hours ago
Now that the explosive finale of Silo season three has arrived fans are already calling out for more information on the next, and final season. Seasons three and four were shot back-to-back, meaning that luckily for fans we've been treated to a trailer already, along with the release date.
While we still need to wait until next July for season four, let's find out more about what we can expect from the next season, who will star in it and the all-important trailer...
Is there a trailer?
Yes, on 4th September, just a day after the season three finale dropped, the trailer was released. Picking up from the final scenes of season three, the trailer showed fans how Daniel and Helen ended up being separated after the bomb explosion left them running for different silos.
We also get an insight into what it was like in the early days in Silo 18, and viewers get to see Sheriff Billings telling the rest of Silo 18 that there are other silos out there, and one of those silos can control their fate.
Who is in the cast?
While the cast has not yet been officially announced, the YouTube description revealed some names, along with those starring in the trailer.
- Rebecca Ferguson (Juliette Nichols)
- Tim Robbins (Bernard Holland)
- Common (Robert Sims)
- Harriet Walter (Martha Walker)
- Chinaza Uche (Sheriff Paul Billings)
- Avi Nash (Lukas Kyle)
- Alexandria Riley (Camille Sims)
- Jessica Henwick (Helen Drew)
- Ashley Zukerman (Daniel Keene)
- Laura Innes (Rosalind Thurman)
- Jessica Brown Findlay (Charlotte Keene)
- Colin Hanks (Per Stensen)
When will Silo season four be released?
It has been confirmed that the fourth season will be released on 9th July 2027. If it is the same as season three, episodes will be released weekly.
How to watch Silo
You can watch seasons one to three of Silo on Apple TV (subscription required). You will be able to watch season four next year when it is released.
What happened in season three?
If you want a full recap of what happened in Silo season three, we have an episode-by-episode guide.
Silo: What happened in season three, episode one - 'Who Are You?'
Silo: What happened in season three, episode two - 'It's All Good'?
Silo: What happened in season three, episode three - 'A Dark Web'?
Silo: What happened in season three, episode four - 'Whatever You Do, Don’t Go Home'?
Silo: What happened in season three, episode five - 'Memory'?
Silo: What happened in season three, episode six - 'The Drive'?
Silo: What happened in season three, episode seven - 'Radio'?
Silo: What happened in season three, episode eight - 'Gray Goo'?
Silo: What happened in season three, episode nine - 'Farewell'?
Silo: What happened in season three, episode 10 - 'Troy'?
Take a look through our Silo glossary:
Going out to clean
Going out to clean in Silo its basically a death penalty. Residents of the Silo who go out to clean don't come back alive. They are sent out for two reasons, either because they break the law or they ask to go out voluntarily.
When they are outside, they clean the lens on a camera that displays on the screens in the cafeterias. Over time the lens gets covered in dust and debris from the toxic wasteland the residents of the Silo can see.
SPOILER! (Juliette is the only person so far to come back alive)
Up Top
The Silo consists of 144 levels, and they are connected by a single spiral staircase, there are no lifts. It is split into three main sections. Up Top is where the primary government offices, the Sheriff's station, and the surface airlock are situated.
The Mids
Below Up Top is The Mids, where many of the residents live along with the schools, and The Farm that grows food for the population. It also houses the Mids Medical, where Juliette's dad, a doctor, oversaw the nursery.
Down Deep
At the bottom of the Silo is the Down Deep. The people who live down there and keep the generator going rarely go up to The Mids or Up Top. There are many Deputy stations throughout the Silo, but the Down Deep Deputy Station is where Deputy Hank Murphy is charge. He is good friends with Juliette and Knox who work on the generator.
The Mines
Being sent to the mines is seen as a punishment for those who break the law. Iron ore was mined from The Mines, which are dirty and full of rats. Lukas Kyle is banished to The Mines for not reporting Juliette's relic.
The Digger Void
The area around the digger that was used to build the Silo is called The Digger Void. In the Digger Void is a camp made by George, where he hides a few relics, later Bernard is found hiding there, after many believed he had died.
Shadow
Someone's shadow is like their deputy, they are expected to learn from their mentor. In one of the early episodes Juliette gets a shadow called Terry Cooper. Juliette was previously Knox's Shadow, when she first transferred from The Mids.
The Algorithm
A select few from the Silo ever encounter The Algorithm, a voice that speaks to certain people about the Silo in a bright room with stepped walls. Although the subtitles call this voice The Algorithm it isn't referred to by the characters as such, and many don't know of its existence.
The Farm and 'going to the farm'
The Farm refers to the many farms in the Silo, where they grow crops and have animals such as pigs and chickens for the 10,000-strong population.
However, there's a slightly grim feature of The Farm, when members of the population die they can be buried in The Farm, so that their body's nutrients helps to feed the crops.
Before Times
Before the Silo was built was the Before Times - set in the near future (2040s). Not much is known about the Before Times in the first two seasons, with the third season beginning to explore why the Silo was created.
Judicial
Similar to the Sheriff, Judicial help to keep law and order in the Silo, they are responsible for enforcing The Pact and confiscating any relics.
Relic
Something from before the Rebellion. It's illegal to be in possession of a relic and knowing that someone has one and not reporting them can also be a punishable offence.
The Pact
The Pact is a book that the rules of the Silo are set out in. Several characters refer to The Pact throughout the series and how they must follow the rules.
The Rebellion
140 years before Silo is set there was a Rebellion when the residents of the Silo stormed the upper levels wanting to open the door to the surface and poison the entire Silo with air from outside. The Rebels burnt all the books, computer drives and anything from the Before Times.
Safeguard
A hidden pipe system which can flood the Silo with toxic gas. Use of it is designed to end the entire Silo's existence, but it isn't controlled by Silo 18, instead it is controlled by the overseers of Silo 1.
Author: Anna Sky Magliola
Anna Sky Magliola is a Digital Content Editor at Rayo, creating content for brands including Hits Radio, Greatest Hits Radio, KISS, Cool FM and Magic Radio. She began her career at Bauer Media in 2007 and has spent almost two decades creating engaging digital content for millions of readers, specialising in music news, celebrity interviews and TV features. A passionate dance music fan, Anna Sky has travelled the world to experience some of the biggest festivals and is always looking for the next great music story.