Silo Season 3 Episode 8 titled 'Gray Goo' was released on Apple TV on August 21. The latest episode of the platform's dystopian thriller series finally solved the mystery behind the formation of the Silos. As Helen and Daniel learned the whole truth from Senator Thurman and Per Stensen, Charlotte made a shocking choice.Elsewhere, in Silo Season 3 Episode 8, the group accused Ed of killing Orla, as he had plans for a secret transportation system that allowed him to steal from Supply. However, Ed revealed, as per Glenda, it was Orla's then-boyfriend Mike who murdered her, after she discovered him stealing from the Supply. The latest episode concluded the mystery behind Orla's murder and Mike was arrested by Hank and Paul.Here is the complete recap.Silo Season 3 Episode 8 explains the formation of the silos View this post on Instagram Instagram PostSilo Season 3 Episode 8 was a game-changing entry for the Before Times timeline as it finally shed light on the formation of the silos. Stensen took the group to his farm and revealed that they are currently building 10 more diggers like this, each of which would dig 5 such silos, resulting in 50 silos in total. However, Daniel suggested using 50 diggers and leaving each in the hole to save time and money. When asked about the silos, Anna stated they were 'seeds.' It was only after Helen pressed the issue that Stensen and Anna revealed that the bunkers are meant to preserve art, literature and the remaining humans (who will repopulate Earth), following the inevitable apocalypse.Silo Season 3 Episode 8 also gave answers about the impending apocalypse. It was revealed that Stensen believes an enemy nation is building a nanotech-based weapon and planning an attack on the US. While Stensen maintained ambiguity, Charlotte confronted him about the 'enemy' nation, revealing that it was Iran. Stensen finally revealed that once the US tried to threaten Iran, they detonated a dirty bomb, which prompted them to send Charlotte and the others as bait to destroy the Iranian nanotech facility.Despite learning she was bait, Charlotte agreed to join Stensen's project as a drone Pilot, but not before Daniel restored a part of her memory using rosemary. Naturally, Helen and Daniel decided they would rather turn 'Gray goo' in the apocalypse than spend their lives in a bunker with the likes of Thurman and Stensen and left the scene in their chopper.Silo Season 3 Episode 8 recap: Camille imprisons Sims and JulietteA still from Season 3 (Image via YouTube/Apple TV)Silo Season 3 Episode 8 also featured the aftermath of Lucas and Kennedy's trip to Silo 17. Turns out, the duo managed to enter Silo 17 but Lucas was unconscious because of the gunshot wound. While Jimmy and the others nursed Lucas to health, Kennedy left in search of the Judicial pipe that could trigger the Safeguard procedure. Kennedy and Rick came across a door welded shut from the inside and they were shocked to discover Jimmy's mother's dead body inside. Turns out, Jimmy's mother sacrificed herself and did not let the poison reach the others in Silo 17.While Jimmy was initially hesitant to move his mother's dead body in Silo Season 3 Episode 8, Lucas and Kennedy convinced him and the duo relayed this information to Juliette in code so that they could cap their own pipe in Silo 18.However, thanks to Bernard's layout, Juliette quickly realized that she had sent Shirley to the wrong pipe. As she rushed to stop Shirley from capping the wrong pipe, Camille's raiders made their way to the duo. Naturally, Juliette sacrificed herself and was arrested by Camille's men, allowing Shirley to make a run for it.In the final moments of Silo Season 3 Episode 8, it was revealed that Camille has arrested both Juliette and her husband Sims, as the latter 'betrayed' her by going behind her back and sending Lucas and Kennedy to Silo 17.You can stream the latest episode on Apple TV.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.