Dr. Kelso's beautiful but unethical replacement, Dr. Maddox, shakes things up at Sacred Heart, while J.D. struggles to manage a new crop of incompetent interns and Carla helps Elliott put her ego in check.

Aseem Batra, Aziz Ansari, Betsy Beutler, Courteney Cox, Eliza Coupe, Eric Artell, James Ritz, Michael Spiller, Taran Killam, Travis Schuldt