The team are forced to explore Morgan's past to prove his innocence when he is arrested for murder in Chicago.
Wilson prepares a 14-year-old leukaemia patient for a last-resort bone-marrow transplant from his younger brother; a mistake that killed a patient a week earlier haunts Foreman.
The twins become popular when other kids discover they live at the hotel; Maddie tutors London in math.
The case of two high school students, one dead and the other missing, leads the team into the world of streetcar racing.
A drug-addicted mother holds her infant daughter hostage, fearing the baby will be taken away from her.