(1973–74), Jabberjaw (1976–78), and Captain Caveman and the Teen Angels (1977–80). The New Scooby-Doo Movies In the fall of 1972, new one-hour episodes under the title The New Scooby-Doo Movies were created; each episode featuring a real or fictitious guest star helping the gang solve mysteries, including characters from other Hanna-Barbera series such as Harlem Globetrotters, Josie and the Pussycats and Speed Buggy, the comic book characters Batman and Robin (later adapted into their own Hanna-Barbera series, Super Friends, a year later), and celebrities such as Sandy Duncan, The Addams Family, Cass Elliot, Phyllis Diller, Don Knotts and The Three Stooges. Hanna-Barbera musical director Hoyt Curtin composed a new theme song for this series, and Curtin's theme remained in use for much of Scooby-Doo's original broadcast run. After two seasons and 24 episodes of the New Movies format from 1972 to 1973, CBS began airing reruns of the original Scooby-Doo, Where Are You! series until its option on the series expired in 1976. ABC years (1976–91) The Scooby-Doo Show and Scooby's All-Star Laff-A-Lympics Now president of ABC, Fred Silverman made a deal with Hanna-Barbera to bring new episodes of Scooby-Doo to the ABC Saturday-morning lineup, where the show went through almost yearly lineup changes. For their 1976–77 season, 16 new episodes of Scooby-Doo were joined with a new Hanna-Barbera show, Dynomutt, Dog Wonder, to create The Scooby-Doo/Dynomutt Hour (the show became The Scooby-Doo/Dynomutt Show when a bonus Scooby-Doo, Where Are You! rerun was added to the package in November 1976). Joe Ruby and Ken Spears, now working for Silverman as supervisors of the ABC Saturday-morning programs, returned the program to its original Scooby-Doo, Where Are You! format, with the addition of Scooby's dim-witted country cousin Scooby-Dum, voiced by Daws Butler, as a recurring character. The voice cast was held over from The New Scooby-Doo Movies save for Nicole Jaffe, who retired from acting in 1973. Pat Stevens took over her role as the voice of Velma. Then Joe Ruby and Ken Spears left again to start their own studio in 1977 as competition for Hanna-Barbera. They would remain away from the rest of the 1980s. For the 1977–78 season, The Scooby-Doo/Dynomutt Show became the two-hour programming block Scooby's All-Star Laff-A-Lympics (1977–78) with the addition of Laff-a-Lympics and Captain Caveman and the Teen Angels. In addition to eight new episodes of Scooby-Doo and reruns of the 1969 show, Scooby-Doo also appeared