Elisabeth Noone

After several of Bailey's patients die, she becomes the focus of a CDC investigation; Cristina teases Alex about his feelings for Jo; Owen continues to take care of Ethan while his parents remain in the hospital.

The BAU team investigates the abductions of young children with troubled mothers in St Louis. Also, Rossi reconnects with his first wife who has shocking news for him.

The BAU goes to Detroit to track an UnSub with a rapidly changing MO. Also, Blake's husband returns from overseas with a life-changing career proposition for her.

Detective Jimmy McNulty - exiled to police boat duty - finds the body of a woman floating in the Baltimore harbour. Bodie drives to Philly to make a connection for the Barksdale crew, and Stringer Bell takes the train to New York to feel out the crew's reticent suppliers.

Sobotka reprimands Nick for stealing cameras; Burrell asks Daniels to lead the detail investigating Sobotka; McNulty begins courting his estranged wife.

The detail carries out a series of raids, leading to a deadly call to action from The Greek. Stringer attempts to play Omar.