When Karen goes in search of Niska, Pete tries to uncover the strange truth about his former partner. Laura provides a refuge for the hunted Synths, giving hope that they and humans can peacefully co-exist but Hobb is on their trail.

With the Hawkins family at their lowest ebb, Laura makes a confession that will have serious implications for Anita and leaves Mattie wondering if she can ever forgive her. Meanwhile, Karen discovers the whereabouts of Niska.

As news of the 'killer Synth' spreads, Karen comes under increased pressure to find Niska. The Hawkins family debate whether they should keep Anita. Joe worries that his secret will be discovered and Mattie puts her trust in Leo.

Laura begins to believe that Anita may be able to develop human traits after meeting a woman who claims her synth is also sentient though whilst she is out Joe has sex with Anita. Leo meets...

After Anita has saved Toby's life in a road accident and is commended by most of the family Laura is dissuaded from sending her back and even begins to warm to her, though she is baffled by...

Laura feels increasingly threatened by the presence of Synth Anita, and Leo's quest for information takes him to dangerous places.

The Hawkins family acquire Anita, a Synth. But instead of making life easier for Laura it creates new tensions. Leo is on the run with his Synth, Max. Pete feels pushed aside by his wife's Synth and George won't part with his.