With very little evidence, Jane and the CBI investigate the death of a mob boss’s son. While taking an eyewitness in for questioning, Van Pelt is haunted by the memories of her fiancé, FBI Agent Craig O’Laughlin (guest star Eric Winter) and his shooting.
T.C. and Jordan accompany a SWAT team on a raid and wind up with an emergency room full of sick immigrants; Scott pulls a team together to impress the colonel in charge of setting up a combat training program; more is learned about Cain's past.
Torres and Lightman question a former gang leader who claims to be rehabilitated; Loker and Foster look into the death of a firefighter who was killed in the line of duty.
While investigating the homicide of an entire family, the team once again finds themselves entangled in an FBI case. They also find themselves distracted by an unusually surly Provenza.
Gang members steal Detective Salinger's weapon; a man exposes himself to Detective Adams.