The division was started on March 21, 1955, with its first and most successful head being Jack L. Warner's son-in-law William T. Orr. ABC had major success against its competition with Walt Disney's "Disneyland" TV series and approached Warner Bros. initially with the idea of purchasing the studio's film library (WB eventually sold the rights to the negatives of pre-1950 films and pre-1948 cartoons and shorts to Associated Artists Productions, or a.a.p., in 1956). WB formally entered television production with the premiere of its self-titled anthology series "Warner Bros. Presents" on ABC. The one-hour weekly show featured rotating episodes of television series based on the WB films, "Casablanca" and "Kings Row", as well as an original series titled "Cheyenne" with Clint Walker. The first one-hour television western, "Cheyenne" became a big hit for the network and the studio with the added advantage of featuring promotions for upcoming Warner Bros. cinema releases in the show's last ten minutes. One such segment for "Rebel Without a Cause" featured Gig Young notably talking about road safety with James Dean.