When does Yabba Dabba Doo! The Happy World of Hanna-Barbera return?

Yabba Dabba Doo! The Happy World of Hanna-Barbera is a 1977 American live-action/animated television special. It premiered on Thanksgiving Day, November 24, 1977. The special is hosted by Gene Kelly with special guests Jonathan Winters, Cloris Leachman and Lorne Greene. It celebrates the 20th anniversary of the partnership of animators William Hanna and Joseph Barbera.