Hanna-Barbera's 50th: A Yabba Dabba Doo Celebration

Hanna-Barbera's 50th: A Yabba Dabba Doo Celebration (also known as A Yabba Dabba Doo Celebration: 50 Years of Hanna-Barbera) is a 1989 live-action/animated special for television first aired on TNT hosted by Tony Danza and Annie Potts celebrating 50 years of William Hanna and Joseph Barbera's partnership in animation. This is the first animated project to be broadcast in Dolby Surround sound system.

It covers their years working for the Metro-Goldwyn-Mayer cartoon studio, and then the history of Hanna-Barbera Productions Inc., which was set up in 1957. It features footage and clips from the studio's various programs along with new animated/live-action wraparounds and a behind the scenes on Jetsons: The Movie.

It was dedicated to the memory of Daws Butler, who died during this production and was also the last television and film project of Mel Blanc, who died one week before the special's telecast. Turner Broadcasting System, which owned TNT, would later buy Hanna-Barbera in 1991.

Cartoon characters
Among the cartoon characters that appear in this special are the following:
 * Astro
 * Augie Doggie and Doggie Daddy
 * Baba Looey
 * Barney Rubble
 * Betty Rubble
 * Brainy Smurf
 * Breezly Bruin
 * Boo Boo
 * Cindy Bear
 * Choo-Choo
 * Dick Dastardly
 * Ding-A-Ling Wolf
 * Dino
 * Elroy Jetson
 * Fancy-Fancy
 * Fluid-Man
 * Fred Flintstone
 * Gargamel
 * George Jetson
 * Hokey Wolf
 * Hong Kong Phooey
 * Huckleberry Hound
 * Jane Jetson
 * Judy Jetson
 * Magilla Gorilla
 * Muttley
 * Papa Smurf
 * Peter Potamus
 * Pixie and Dixie
 * Punkin' Puss
 * Quick Draw McGraw
 * Rosie the Robot Maid
 * Ruff and Reddy
 * Scooby-Doo
 * Secret Squirrel
 * Shaggy
 * Smurfette
 * Snagglepuss
 * Snooper and Blabber
 * Sneezly Seal
 * Squiddly Diddly
 * Tom and Jerry
 * Top Cat
 * Touche Turtle
 * Wally Gator
 * Wilma Flintstone
 * Yogi Bear
 * Jerry Mouse
 * Tom Cat

Celebrities

 * Tony Danza (host)
 * Annie Potts (co-host)
 * Betty White
 * Joe Ferguson
 * Jonathan Winters
 * Phyllis Diller
 * Sammy Davis, Jr.
 * Shari Belafonte
 * Tiffany
 * Tommy Lasorda
 * Valerie Harper
 * Victor Borge
 * Whoopi Goldberg

Voices

 * Greg Burson - Yogi Bear, Huckleberry Hound, Quick Draw McGraw
 * Danny Goldman - Brainy Smurf
 * Casey Kasem - Shaggy
 * Don Messick - Boo Boo, Scooby Doo, Muttley, Papa Smurf
 * Greg Berg - Baba Looey, Augie Doggie
 * Henry Corden - Fred Flintstone
 * Jean Vander Pyl - Wilma Flintstone
 * George O'Hanlon - George Jetson
 * John Stephenson - Doggie Daddy, Snooper
 * Mel Blanc - Barney Rubble
 * Lucille Bliss - Smurfette
 * Penny Singleton - Jane Jetson