Frank is put in danger when his dinner companion, mob lawyer Angelo Gallo, is shot. Later, Danny is a juror in a murder trial.
Alex receives information about her father and his past at the FBI; the recruits learn the art of profiling.
The NATs practice surveillance with Miranda and her troubled son; Shelby tries to keep Caleb at arm's length, while Raina allows Simon closer; Alex gets help when she tries to hack an FBI computer.
FBI computers are hacked, revealing confidential files that make Alex think a second bomb is somewhere in New York; the recruits receive individual assignments that turn out to be connected.
More questions arise when the Grand Central Station bombers are revealed; back at Quantico, the recruits receive time off for the holidays.