Grey's Anatomy star Eric Dane, who plays Mark Sloan, decided to bring the big guns to work in Los Angeles yesterday morning. See below ...

In between flexing his bulging biceps, the 35-year-old actor shot scenes with co-stars Katherine Heigl, Patrick Dempsey and Brooke Smith.

Always good to see the gang back in action. Click to enlarge some more photos of the aforementioned Grey's Anatomy stars on the set ...

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