10 episodesFirst aired 2 July 2026
Season three reveals an origin story set centuries earlier, while continuing the saga of a dystopian society of 10,000 people living underground under mysterious circumstances. In the present, Juliette Nichols survives her forced "cleaning" but returns with memory loss as the silo recovers from rebellion and faces a dangerous new threat. Meanwhile, in the "Before Times," journalist Helen Drew and Congressman Daniel Keene uncover a conspiracy that pulls them into a chain of events with catastrophic, irreversible consequences.
E1Jul 202656m
New mayor Juliette can't remember anything from her time outside—or her past.
E2Jul 202651m
Billings investigates a disappearance. Daniel Keene has a run-in with a reporter.
E3Jul 202649m
Juliette takes control of her recovery process. Helen suffers consequences of her investigation.
E4Jul 202648m
The race to evade Camille leads Juliette to a shocking discovery. Daniel seeks help from a friend.
E5Jul 202652m
The events following Juliette's return come to light—and unexpected allies are made.
E6Aug 202655m
Billings and Hank stumble on a new mystery. Daniel and Helen receive a surprising proposition.
E7Aug 202656m
Juliette sends Lukas and Kennedy on a mission, as a desperate Camille threatens Robert to tell the truth.
E8Airs Aug 2026Not yet aired
Airs Aug 2026Not yet aired
Airs Sept 2026Not yet aired