S5, E23: Sparks fly when J.D. gets a consult from a specialist -- Elizabeth Banks ("The 40- year- old- virgin") guest stars in part one of a surprising two-part season finale -- J.D. (Zach Braff) challenges a urologist's (guest star Elizabeth Banks, "The 40- Year-Old Virgin") assessment on a consult for a patient who might need a risky surgical procedure, feeling that she's playing it safe professionally and personally, since he also starts to fall for her. Along the same lines, Elliot (Sarah Chalke) considers breaking up with her boyfriend/intern Keith (Travis Schuldt) for being too weak, especially when he's being picked on by Dr. Cox (John C. McGinley). Neil Flynn and Ken Jenkins also star.