Scrubs S06 E20 My Conventional Wisdom

"Laughter is the best medicine... Especially when it's your first day as a doctor."

J.D. and Turk go to a medical convention in Phoenix, Arizona, where they run into J.D.'s ex-girlfriend Dr. Kim Briggs, who has a surprise for J.D. Meanwhile at Sacred Heart, the janitor pretends to be the chief of medicine and Dr. Cox starts to put doubts about the wedding into Elliot's mind.