Mark A. Sheppard

Neil Gaiman, Mark Sheppard, & Toby Haynes—Doctor Who—4/3/11
[Gaiman:] Originally the episode actually started as if you were in the middle of another episode. And the Doctor and Amy are off having an adventure, and they've been captured...[an] essentially Simpsons-style beginning...
Doctor Who: The Complete Sixth Series (2011)
The Doctor dead? Not on your life.
Supernatural: The Complete Eighth Season (2005)
The stars still deliver, the supporting cast (especially Collins and Mark A. Sheppard as demon Crowley) remains prized, and the writers keep coming up with witty variations on the show's Route 66-meets-The X Files premise.