Plot Synopsis:
In the near future, technological advances have brought about the creation of life-like humanoid servants, called Synthetics—or synths—that help busy families simplify their lives. Joe Hawkins (Tom Goodman-Hill), disheartened by his wife, Laura's (Katherine Parkinson), distance, and his children's indifference, purchases a synth with the hope that it will ease the family's struggles. The synth, Anita (Gemma Chan) is an instant hit with Joe's children, but Laura can't shake her unease or the feeling that something is very wrong with Anita.
As the Hawkins family adjusts to life with Anita, retired synth engineer George (William Hurt) can't bring himself to get rid of his beloved, but malfunctioning synth, Odi (Will Tudor). And mysterious Leo (Colin Morgan) desperately searches for someone with his synth, Max. But why does Max seem different from other synths, and what secrets are the two holding?