In this photo from the Season 5 premiere of Grey's Anatomy, "Dream a Little Dream of Me," an intense Dr. Derek Shepherd (Patrick Dempsey) appears to be getting more and more caught up in a really heated discussion with Dr. Owen Hunt (Kevin McKidd).

Kevin McKidd guest stars as Dr. Owen Hunt in this photo from the Season 5 premiere of Grey's Anatomy, "Dream a Little Dream of Me."

Dr. Owen Hunt (Kevin McKidd) returns to Seattle Grace in this picture from "There's No 'I' in Team," from Season Five of Grey's Anatomy.

It's a new day at Seattle Grace and a new doctor - Owen Hunt - is already shaking things up.

That's what the man in charge does, and Owen Hunt steps up to the plate in this promotional photo from "Life During Wartime," in the fifth season of Grey's Anatomy.

DOCTOR Major Owen Hunt, that is. Kevin McKidd plays the Army surgeon who is back at Seattle Grace and seen here in a promotional photo from "Life During Wartime," in the fifth season of Grey's Anatomy.

That's what Alex Karev and Owen Hunt are doing in this promotional pic from "Life During Wartime," in the fifth season of Grey's Anatomy.

Dr. Owen Hunt is played by guest star Kevin McKidd, and he is shaking things up in "Life During Wartime," from the fifth season of Grey's Anatomy.

Major Dr. Owen Hunt is now at Seattle Grace, but his Army mentality is still ever-present in the appropriately-titled "Life During Wartime," from Season Five of Grey's Anatomy.

If the interns thought Bailey was bossy, they have not seen anything yet as Owen Hunt (Kevin McKidd) is out to run the show in "Life During Wartime," from Season 5 of Grey's Anatomy.

He deserves the name in the opinion of many - or at least a certain surgeon named Yang. Kevin McKidd stars as Owen Hunt in "Life During Wartime," from Season Five of Grey's Anatomy.

In this photo from the Season 5 premiere of Grey's Anatomy, "Dream a Little Dream of Me," Dr. Derek Shepherd (Patrick Dempsey) appears to be in a heated debate with Dr. Owen Hunt (Kevin McKidd).