Bob Lee Swagger and wife Julie join his former Marine unit in Germany and narrowly escape a deadly terrorist attack. FBI Agent Nadine Memphis takes a job in Washington with Patricia Gregson.
Callie gets control of her life and starts auditing art classes at a local college; Jesus distances himself from Mariana and Brandon so he can build his tree house with Gabe alone; and the Fosters get a new neighbor who has history with Stef.