Leonard tries to mould Penny into his dream woman and rewards her with chocolate when she does things he approves of in the hope that she will keep doing them.
Luke Alvez joins the BAU team, aiding in the capture of a serial killer who escaped from prison after a man is found in Tempe, Arizona, with deep cuts on his abdomen.
Caroline isn't best pleased when Max takes her shopping in a charity shop of all places, and a fight breaks out over a Strokes T-shirt.
Mona must answer to the police; Hanna attempts to repair Mona and Lesli's friendship; Emily encourages Sara to consider the possibility of emancipation; Alison and Lorenzo grow closer.
When a man calls Lilly to confess to the murder and burial of his grandmother 14 years ago, Rush and the team investigate the caller's identity.