Laura feels vindicated when Mattie tells her that she has seen Anita acting strangely. Laura insists that the family take Anita for testing and they're shocked to discover she's 14 years old. After meeting Leo through the Headcracker forum, Mattie thinks she might have an idea. Pete becomes stir crazy, stuck in the house with Simon.
Humans is set in a parallel present where the latest must-have gadget for any busy family is a 'Synth' - a highly-developed robotic servant eerily similar to its live counterpart. In the hope of transforming the way they live, one strained suburban family purchases a refurbished synth only to discover that sharing life with a machine has far-reaching and chilling consequences.
Humans - Series 1, Episode 4 Synopsis and Schedule