'I barely know what I'm doing!'

Stars Rebecca Ferguson and Common discuss what viewers should expect in the third season of Silo

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What would happen if you lost your memory? It's the stuff of nightmares and the question at the heart of the third series of Apple TV's hit sci-fi series Silo.

The show is set in a ruined and toxic future, where thousands of people live in a giant silo deep underground where Mission: Impossible and Dune star Rebecca Ferguson plays an engineer who becomes embroiled in the mysteries of its past and present.

The third outing of the drama - based on Hugh Howey's New York Times best-selling trilogy of the same name - unravels an origin story set centuries earlier, while Ferguson's character Juliette Nichols, suffers with memory loss as the silo recovers from a rebellion and faces a dangerous new threat.

Meanwhile, Robert Sims, played by rapper and actor Common, and his wife, Camille, step into new roles as a newly appointed judge and the head of IT, who are hell-bent on feeding Juliette lies to protect the Silo and their family, including their son.

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.

Ahead of the release, Ferguson and Common discuss the power of memories and the innovation of technology.

How did the loss of memories help Juliette indirectly find herself again?

RF: What I found interesting, and also very hard for Juliette, is having a memory loss, but not knowing you have it, so it doesn't really affect you, other than the eyes of the beholders around you.