Loki has been brainwashed. I don't know if they start out knowing that or not. They're on the helicarrier and Loki's being held in a medical room. At one point, Loki tries to kill himself by jumping out of the helicarrier and Tony stops him. Loki and Darcy form a close friendship and she has a cat. She brings the cat for Loki while she's studying and Loki really likes the cat.
I'm sorry. I know that's so jumbled, but those are the parts that I can remember.