The good doctor and husband

The Season Four cast of Grey's Anatomy: Starring the lovely Ellen Pompeo (Meredith Grey), Patrick Dempsey (Derek Shepherd), Sandra Oh (Cristina Yang), Katherine Heigl (Izzie Stevens), T.R. Knight (George O’Malley), Justin Chambers (Alex Karev), Chandra Wilson (Miranda Bailey), James Pickens, Jr. (Richard Webber), Sara Ramirez (Callie Torres), Eric Dane (Mark Sloan) and Chyler Leigh (Lexie Grey).

Derek and Julia, Mark's girlfriend, in the next new episode of Grey's Anatomy.

Addison and Derek share a laugh.

Cristina and Derek discuss the events of the day.

That's what it's all about at Seattle Grace.

This elaborate surgery required all Seattle Grace had.

Come on, Addison. You can do better!

Derek does his thing in "Give Peace a Chance." Whether he is successful is a different story. We have faith in Der, though.

It's not always easy for Derek and Addison, but they try to get along.

Richard, Derek and Mark prepare for the complicated surgery.

The Shepherds exchange words. Most of them not kind.