Overview:Alvarez takes over while Sergeant Brown is away. Things go south when Alvarez releases Bo Keebler, a man who recently tried to rob a Chinese restaurant, into the custody of U.S. Marshall Foster. Casey Alvarez, and Walsh discover information that suggests Foster isn't exactly who he claims to be after the precinct receives a bomb threat. Banks tries to stay in his apartment until after his 43rd birthday to keep from being killed.