Karim returns to the house with reinforcements, OA tries to access Nina’s memories, and Hap offers to discharge Scott — after one last experiment.

Karim visits Nina at the clinic for help finding the secret entrance to the house. Meanwhile, Hap meets a fellow traveler, and Homer goes on a date.

The OA retraces the dramatic twists and turns in her life after a childhood accident, leading up to a fateful encounter far from home many years later.

A woman missing for seven years turns up at a hospital with strange scars on her back but can’t — or won’t — reveal where she’s been.