24 Hours (1) (a.k.a. The Longest Day (1)) - S1-E1
Trivia: The first four episodes of the show all began the same way - with one of the doctors being awakened early in the morning from 'Exam 8' at the end of the hallway, in this order: Greene (Pilot), Lewis (Day One), Benton (Going Home), Carter (Hit and Run). Ross (George Clooney) was the only one of the original five who never slept in Exam 8.
Going Home - S1-E4
Trivia: Madame X, the patient who nobody knows which doctor is treating her, is played by George Clooney's aunt Rosemary.
Answer: Take care of your dad.