Synopsis by Hal Erickson
Derek (Patrick Dempsey) tears into Meredith (Ellen Pompeo) over her perceived relationship with Mark, but this time she gives back as good as she gets--with startling results. Likewise trading angry words are Burke (Isaiah Washington) and Cristina (Sandra Oh), while Izzie (Katherine Heigl) manages to upset Denny (Jeffrey Dean Morgan) even as she tries to cheer him up. Elsewhere, Callie's sanitary shortcomings cause problems with her temporary roomates; and we learn a bit more about handsome veterinarian Finn (Chris O'Donnell). But all these intrigues take second place to a horrible automobile accident caused by an intern (John Cho) suffering from short-term memory loss. In the episode's climactic moment, it appears as though a female crash victim will die, but there's a slim chance that her unborn baby can be saved.