Niska is living as a fugitive in Berlin, while the other Synths are laying low in the UK - Violence
Laura must decide whether to accept Niska's request, while Karen and Pete learn about a special Synth being sold for unprecedented amounts on the black market. Meanwhile, Hester uses questionable means to gain information from her prisoner.
Athena travels to the UK and her tragic secret is revealed. Niska's consciousness assessments begin. With more time at home Joe notices Sophie's increasingly eccentric behaviour.
Mia and Ed get closer but their relationship is thrown into jeopardy when their secret is discovered. Things look bleak for Niska until Laura brings in a surprise witness. - Violence
When Mia risks falling into the hands of a mysterious organisation, she is forced to take drastic action, while Sophie is awestruck by Renie's ''Synthie'' lifestyle
Athena challenges Milo's ethics and is shocked when he reveals his plan, while Mia's return has ramifications for the Hawkins family
Gemma Chan
Mia
Emily Berrington
Niska
Colin Morgan
Actor
Ivanno Jeremiah
Max
Katherine Parkinson
Laura Hawkins