ER: Full Moon, Saturday Night

The new ER chief, Dr Swift, makes a dramatic entrance and starts to upset people with his unique style. Mark finds it hard to shake off the guilt he feels after the death of his pregnant patient, so decides to take a day off. Doug tries to convince Mark that the death wasn't his fault but to no avail, Mark's wife finds him at his home train station sitting on a bench where he has been all night. Carter and Deb are getting increasingly competitive with one another. Susan and Carol deal with a series of rather unusual patients. Peter gets angry when his mother is released from hospital too early and Doug is seeing Diane on a regular basis now.