"The Bugs Bunny/Road Runner Hour" became "The Bugs Bunny/Road Runner Show" in November 1977 after CBS added another half-hour to the runtime. In 1981, a companion "Sylvester & Tweety, Daffy, and Speedy Show" was added to the CBS schedule, which included a number of later cartoons produced by a reestablished Warner Bros. Cartoons studio from 1967 to 1969. The following year, this new companion series was canceled, and its cartoons were incorporated into "The Bugs Bunny/Road Runner Show", which was broadcast as two separate hour-long programs on Saturday mornings (for the second program, the show's opening titles were re-animated). In 1983, CBS returned the show to 90 minutes and the bridging sequences were dropped. The following year, the "This Is It" opening was jettisoned altogether; a new title sequence (created from clips of the cartoons) and new theme song ("It's Cartoon Gold"), composed by Steve Zuckerman with lyrics by John Klawitter, introduced the show.