Martin questions his genetic link with his sons when an out-of-town guest arrives, and Daphne and Niles plan for the future.
Katie and Greg try to drive a wedge between Taylor and her new boyfriend; Greg helps Oliver plan a date with a girl from his ballet class.
JD encourages the other doctors to perform specials tasks for their patients. Turk and Carla try to increase their chances of conceiving by getting rid of extra stress in their lives.
George tries to conceal his ATM code from his fiancée, Susan; Elaine is intrigued by a man she met at a party.
Sloane is told that Sydney is the SD-6 mole, putting her life in danger; Dixon is shot; Will thinks Kate Jones' pin is the key to some unexpected information.