Although CBS Inc.'s CBS has not yet made a commitment to provide any of its shows for downloading from Apple's iTunes Music Store, its Showtime pay-TV channel has. Showtime said Tuesday that original episodes of Sleeper Cell, Weeds, and Fat Actress are now available from the Apple website for downloading at the standard price of $1.99 per episode. Showtime is the only cable network retained by CBS Inc. following the recent split-up of Viacom. The new Viacom's MTV, Nickelodeon, and Comedy Central have each made separate deals to sell programs on the iTunes website.