Betsy Beutler

The new chief of medicine turns out to be as callous as Dr Kelso, JD gives up on his intern class after they let him down, and Eliot is too self-absorbed to realise that Keith is still hurt from their break-up.

Dr. Kelso and Dr. Cox try to oust Dr. Maddox (Courteney Cox) from Sacred Heart; Carla decides to take a self-centered, incompetent intern down a notch.

When a man is found castrated and left for dead, Rollins and Carisi uncover three female suspects who have possible motives; Langan gives devastating news to Benson.

The new interns are put to the ultimate test when they're asked to perform in the annual sketch show.

JD enlists the help of Elmo from the Muppets to teach the gift of compassion to a blunt intern Denise but is disappointed when even Elmo can't make Denise more empathetic. Elliot's intern meanwhile, boasts that she has her mentor wrapped under her little finger.

JD argues with the Chief of Medicine but Turk is jealous when the staff show his best friend a new level of respect. Meanwhile, the Janitor convinces JD that he has been hypnotised and Carla is attracted to her new intern.