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 televsion special. Originally airing on TNT, the special featured hosts 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 presented in Dolby Surround sound system.