The latest pilot castings from Variety and the Reporter: Timm Sharp (Undeclared, and a recent guest star on 'Til Death) is Jason Biggs' annoying roommate in the CBS comedy I'm in Hell. Nathan Gamble (Babel) has landed the lead in Fox's untitled comedy about a 10-year-old helped through life by his crazy grandfather (Tom Conti). Macey Cruthird (Hope & Faith's Hayley) is Gamble's older sister. Ian Gomez (Felicity) is Steve Howey's veterinary-clinic partner in Fox's The Beast. Dash Mihok (Hollywoodland) has joined ABC's Cavemen.