ER/Fevers of Unknown Origin
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Fevers of Unknown Origin is the twentieth episode of the second season of ER, and the forty-sixth episode overall.
Guest Stars: Marg Helgenberger (Karen Hines), Scott Michael Campbell (Reilly Brown), Mary Mara (Loretta Sweet), Michael C. Mahon (Joe), Lynn Milgrim (Ms. Crandell), Mariangela Pino (Mr. Delanova's Daughter), Romy Rosemont (Joanne Barris), Al Ruscio (Mr. Delanova), Ellen Crawford (Lydia), Yvette Freeman (Haleh), Ron Eldard (Shep), Christine Elise McCarthy (Harper Tracy), Christine Harnos (Jenn Greene), Laura Innes (Dr. Kerry Weaver), CCH Pounder (Dr. Angela Hicks), Kathleen Wilhoite (Chloe Lewis), William H. Macy (Dr. David Morganstern), Pierre Epstein (Dr. Bradley), Scott Williamson, Annie O'Donnell (Eve), Rex Ryon (Eugene), Conni Marie Brazelton (Conni), Deezer D. (Malik), Lily Mariye (Lily), Kristin Minter (Randi), Meloney Black (Becky), Kevin Graves (Josh), Christopher Graves (Danny), Vien Hong (Young Banger), Chad McKnight (Cop), Fran Montano (Johnson), Eddie Mui (Old Banger)
Susan absorbs herself in her work in order to avoid dealing with the fact that her sister, Chloe has been given custody of Little Susie; in order to graduate, Carter has to do a pediatric rotation with Doug; as Mark finalizes his divorce with his wife, the two of them end up getting intimate with each other; Doug continues to see his father's girlfriend, Karen; Shep's behavior becomes more aggressive and ends up shoving a boy who interferes with him treating a patient.