Steve Cooper talks with actor Mark Metcalf. Mark is best known for playing ROTC officer Douglas C. Neidermeyer in the movie classic Animal House, a character he later emulated in the popular Twisted Sister videos We're Not Gonna Take It and I Wanna Rock, portraying The Maestro in Seinfeld and his recurring role as The Master in Buffy the Vampire Slayer. He has also been seen in TV shows such as Miami Vice, Angel, Party of Five, Walker Texas Ranger, Hill Street Blues, Teen Angel, Ally McBeal, Melrose Place, JAG and Mad Men.