The second season picks up several months after the events of Season 1, with Niska (Emily Berrington) still at large and in possession of the consciousness code.
Her synth family - Mia (Gemma Chan), Leo (Colin Morgan) and Max (Ivanno Jeremiah), unaware of her location - are each trying to find their place in the world while Joe (Tom Goodman-Hill) and Laura (Katherine Parkinson) attempt to mend their marriage.
As unconfirmed reports of synths behaving inexplicably surface, the ripple effect of one simple yet seismic decision sees the past return dramatically and surprisingly to the door of the Hawkins house. Joe, Laura and the entire family are faced with a difficult choice that will put the family under an intense spotlight.
As an emerging form of intelligent life - the synths - and an established one - humanity - fight for their places in the world, a thrilling multi-stranded narrative evolves which continues to ask: who has the right to determine what it means to be alive?
Carrie-Anne Moss joins the cast as Dr. Athena Morrow, a pre-eminent Artificial Intelligence expert who is driven by her own motives to create a new kind of machine consciousness.
Additional casting includes, Sam Palladio as Ed, a struggling café owner trying to breathe life into his family business; and Marshall Allman as Milo Khoury, a young Silicon Valley billionaire, founder and CEO of a leading technology company; intent on changing the world.
Additional returning cast includes Lucy Carless as Mattie Hawkins, Theo Stevenson as Toby Hawkins, Pixie Davies as Sophie Hawkins, Neil Maskell as D.S. Peter Drummond and Ruth Bradley as D.I. Karen Voss.
Humans is written by Sam Vincent and Jonathan Brackley (Spooks: The Greater Good) with Joe Barton, Charlie Covell and Iain Weatherby. The series is produced by Kudos in association with Matador Films.
Executive producers are Derek Wax (The Hour, Capital) and Chris Fry (The Smoke, Spooks) for Kudos; Vincent and Brackley; and Henrik Widman and Lars Lundström for Matador Films. The series is produced by Paul Gilbert and directed by Lewis Arnold (Broadchurch), Carl Tibbetts (Black Mirror: White Bear), Francesca Gregorini (The Truth About Emanuel) and Mark Brozel (Dickensian).
Humans was commissioned for Channel 4 by Beth Willis and Simon Maxwell, and Joel Stillerman and Kristin Jones for AMC.
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DI Karen Voss
DI Pete Drummond
and Carrie-Anne Moss
Dr. Athena Morrow