A car crash involving students going to their college graduation takes its toll on the residents in the ER, Derek's wedding gift is uniquely suited for Meredith - even if the oversight is not. Meanwhile, Denny's return has Derek and Bailey searching for the cause, and the results will change the outcome of the day.
Stars: Ellen Pompeo, Sandra Oh, Katherine Heigl
Director(s): Rob Corn
Writer(s): Shonda Rhimes, Peter Nowalk