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. ~ Hal Erickson, All Movie Guide