With the school prom imminent, Will - his brain still nano-charged - decides to invite Eve as his date, allowing her to attend and help fulfil her learn protocol. Perceiving this as a snub, Lily forces Will to confront their feelings for one another. Meanwhile, at Calimov, Katherine is working against the clock to find a cure for her degenerative injury.

Will's nanobots are rapidly failing, and Nick must lay aside his suspicions when Katherine appears with a hi-tech solution.

Will and Lily aren't speaking. Worse still, Will is suffering adverse side-effects from protecting his friends from the rogue KT.

The discovery that Mary has cheated death throws the gang into chaos. If Mary were to take control of Eve permanently, she would be unstoppable.

Having been unknowingly possessed by Mary, Eve is on high alert. Matters are made worse by the fact that her memories of recent events are corrupted. Eve's investigation is put on hold when Abe embroils her in a family drama. The Watsons have been invaded by their crotchety grandma Gloria, who is irate having discovered Abe's online competition to name his newborn brother.

Mary resorts to extreme measures to head off the threat of Cain and Price, enlisting KT to help her temporarily transfer her consciousness to Eve.

In an attempt to find rogue robots, Cain and Michael Hoffman go to the Clarke house. Will Eve be able to evade discovery?

Rebecca and Nick are desperate to get to the bottom of Will's nanobot problem, so they take him into Calimov to run some tests.

Eve's attempts to help her sister KT pass for human are derailed when a recovered Katherine returns to Calimov.