When Titus Welliver learned that he was going to audition for the role of a medical doctor on the ABC cop drama, his hopes fell. He remembers saying to his manager at the time, “'They’re never going to cast me as a doctor. Everybody thinks that I’m an Italian thug from New York.'”

Nevertheless, “I remember pulling myself together and actually wearing a button-down shirt and combing my hair, and I think I wore my reading glasses — anything I could to soften my look.”

Apparently, it worked. Producer David Milch wound up awarding him the role of Dr. Mondzac — which was supposed to be a one-off but turned into a recurring character — on the spot.

http://tvline.com/gallery/titus-welliver-lost-supernatural-suits-photos-memories-from-the-set/#!3/titus-welliver-nypd-blue/