Scooby's All-Star Laff-A-Lympics is a two-hour Saturday morning animated program block produced by Hanna-Barbera Productions and broadcast on ABC from September 10, 1977, until September 2, 1978.^[1]

The block featured five Hanna-Barbera series among its segments: Captain Caveman and the Teen Angels, Laff-A-Lympics, The Scooby-Doo Show, The Blue Falcon & Dynomutt and reruns of Scooby-Doo, Where Are You!. During the second season in 1978–79, the show was re-titled Scooby's All-Stars and broadcast on ABC from September 9, 1978, to October 28, 1978. The runtime was reduced from 120 minutes to 90 minutes by dropping The Blue Falcon & Dynomutt and Scooby-Doo, Where Are You!.

Scooby's All-Star Laff-A-Lympics included five cartoon segments:^[2]

• Captain Caveman and the Teen Angels (one episode, 11 minutes): Comedy/mystery show about three female teenage detectives and their companion, a prehistoric caveman superhero thawed from a block of ice. Sixteen episodes were produced for 1977–78.
• Laff-A-Lympics (one episode, 30 minutes): Based on Battle of the Network Stars, this series featured 45 Hanna-Barbera characters, including Scooby-Doo, Yogi Bear, Mumbly, and others competing in Olympics-styled events. Sixteen episodes were produced for 1977–78.
• The Scooby-Doo Show (one episode, 30 minutes): Comedy/mystery show about four teenage detectives and their talking dog, Scooby-Doo. Eight first-run episodes were produced for 1977–78, with 16 made for The Scooby-Doo/Dynomutt Hour from 1976–77 re-run following the final first-run episode. Two of the new episodes, as well as two others from 1976–77, feature Scooby-Doo's cousin Scooby-Dum as a recurring character.
• Scooby-Doo, Where Are You! (one episode, 30 minutes): reruns of the first Scooby-Doo series, originally run on CBS from 1969–70.
• The Blue Falcon & Dynomutt (one episode, 11 minutes each): New episodes featuring the superhero Blue Falcon and his bumbling cyborg dog sidekick Dynomutt, introduced the previous year in the Dynomutt, Dog Wonder segments of The Scooby-Doo/Dynomutt Hour. The new Dynomutt episodes were two-part cliffhangers, of which eight episodes (four stories total) were produced for 1977–78.

When the show became Scooby's All-Stars during the second season on September 9, 1978, the Blue Falcon & Dynomutt and Scooby-Doo, Where Are You! segments were dropped and two Captain Caveman segments were broadcast instead of just one; eight new Laff-A-Lympics and eight new Captain Caveman segments were produced for the block in 1978–79. The Scooby-Doo Show began the 1978–79 season in reruns, though starting from November 11, seven new episodes (produced for an aborted revival of Scooby-Doo, Where Are You! as a separate half-hour) were run as part of Scooby's All-Stars.

For the 1979–80 season, the block was cancelled and Scooby-Doo became a half-hour show as Scooby-Doo and Scrappy-Doo. Laff-A-Lympics and Captain Caveman would resurface on ABC during the latter part of the season in 1980.

• List of Scooby-Doo media

• Scooby's All-Star Laff-A-Lympics at IMDb