The murder of a Sex Crimes detective leads Major Crimes into the world of pornography; Rusty's biological mother returns with some surprising news.
After an ISIS-inspired attack against a member of the U.S. Armed Services, the FBI seeks Captain Raydor's help to find a terrorist.
While looking into purchasing a new home, Flynn seeks input from Provenza and Buzz; Buzz continues to investigate the circumstances surrounding his father's murder.
Det. Julio Sanchez's application to become a foster parent is jeopardized by his reaction to a gruesome murder; the Major Crimes Division finds a chopped up body burned to bits in a barbecue pit.
The city's tourist industry is threatened by an English journalist when a pair of British tourists are attacked on their second honeymoon in Venice Beach; Rusty's biological mother tries to make peace with him.
After a shootout in a tow yard leaves three people dead, Major Crimes sets out to find a disturbed man with a bag full of guns; Rusty tries to find more evidence related to the murder of Buzz's father and uncle.