While visiting from Florida, Bill's macho father, Al (Paul Sorvino), decides he wants to spend some quality time with his son so he makes plans to re-create a past bowhunting trip he took Bill on as a child to toughen the boy up. Brian, meanwhile, sharpens his math skills as he prepares to compete in the Math Olympics. Scully: Charlie Robinson. Slim Callahan: Ron Dean. Grinds: Jerry Hardin.