Dr. Cox's friend and former brother-in-law Ben Sullivan is at the hospital to have a two-by-four removed from his hand. Ben is Jordan's brother, but he sided with Cox in the divorce and they've remained good friends ever since. J.D.'s patient unexpectedly turns out to be Ben himself. Ben's hand wound begins to bleed while he, J.D. and Dr. Cox are hanging out at a bar playing pool. This raises a red flag with the doctors. Dr. Cox runs some tests at the hospital the next day. J.D. gets the test results back - it's Leukemia.