In "Tonsil Trouble", he seen working under the Senior AIDS researcher in the AIDS Research Center, totally doubting his superior and Mitch's (his cohort) hypothesis based upon Magic Johnson's life that injecting a person with "about 180,000$" concentrated right to the vain will cure AIDS. This hypothesis is proven correct by Kyle Broflovski's recovery from AIDS.
He makes in a cameo in "Over Logging".
He is a black-haired man. He wears a white lab coat over a brown pullover, shirt and tie, and dark grey pants.