Petra treads on dangerous ground in her attempt to solve the Mosaic puzzle. Finale.

Carter is overwhelmed by patients from a rock concert riot. Benton’s former girlfriend is killed in a car accident. Newly promoted to chief resident, Chen panics and misdiagnoses a patient….

An arm in a shark’s gullet and a girl who was shot at sea lead the team to a smuggler who was running Cuban refugees and cocaine in a foundering…