 The guest stars during the five-week period included Melissa Sue Anderson, Tom Bosley, Gary Burghoff, Charo, Leif Garrett, Melissa Gilbert, Dan Haggerty, Linda Lavin, Peter Lupus, Gavin MacLeod, Tony Randall, Connie Stevens, The Sylvers, Twiggy, Abe Vigoda, Betty White and Anson Williams.The stars introduced themselves rather than by an announcer.Costumed actors impersonating Hanna-Barbera cartoon characters such as Yogi Bear, Huckleberry Hound and Snagglepuss (all voiced by Daws Butler) made cameo appearances.