S4, E6: J.D. (Zach Braff) dismayed when his brother (guest star Tom Cavanagh) Dan shows up with news of their father's recent death. Everyone faces the challenge of how to be sensitive to J.D. and stumbles over their words of condolence. Meanwhile, Turk (Donald Faison) has symptoms of diabetes but in his stubbornness, refuses to admit it or visit a doctor as Carla (Judy Reyes) wishes. Molly (Heather Graham) must employ some advanced psychology to force him to face the issue. Sarah Chalke, John C. McGinley, Ken Jenkins and Neil Flynn also star.