With this episode, Hallee Hirsh takes over from Yvonne Zima in the role of Rachel Greene, the rebellious daughter of Dr. Mark Greene (Anthony Edwards). Rachel pops up unexpectedly in Chicago, announcing that she's run away from her mother and that she intends to move in with Doug. Elsewhere, an outraged Weaver (Laura Innes) fires Malucci (Erik Palladino) after he is caught in the middle of an on-the-job sexual indiscretion (in the back of an ambulance!); Carter (Noah Wyle) performs a "reverse burglary" on Abby's (Maura Tierney) behalf; and Corday (Alex Kingston) nods off during surgery. ~ Hal Erickson, Rovi