Showtime operates a subscription video-on-demand television service called Showtime on Demand, which is available at no additional charge to Showtime subscribers. Showtime on Demand offers feature films, episodes of Showtime's original series, adult programming and sports events. Showtime on Demand's rotating program selection incorporates select new titles that are added each Friday, alongside existing program titles held over from the previous one to two weeks. The service began to be test marketed in 2001 and was officially launched in July 2002.