Fred was one of Jimmy Quidd's band mates in the Season 4 episode Games. He was portrayed by actor Nick McCallum. Fred is the one who challenges Jimmy when he says he doesn't feel like going on. He laughs when Jimmy starts bashing Rex's guitar.
Later, in the hospital, House notices needle marks on his arm and searches him for drugs, which he finds. Fred protests, but House reminds him that drug possession is a crime. House comes to the conclusion that Jimmy and Fred have been sharing needles.