Teddy, Amy and Charlie plan a trip to Chicago to visit their rich great-aunt Nell, where they are instead mistaken for the Duncan Sisters, a famous hip-hop dance duo and…

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

After a harrowing ordeal, OA and Karim find themselves locked inside a labyrinth of puzzles. Nagging doubts prompt Homer to snoop on Dr. Percy.

While private eye Karim Washington scours San Francisco for a missing teen who was involved in a cryptic game, OA wakes up in unfamiliar surroundings.