Yo-Yo (aka Gregory Yoyonivich): This android robot was a police detective in the 1976 series Holmes & Yo-Yo. Like many comedies featuring our mechanical friends, no one was supposed to know the cop Yo-Yo (John Schuck) was a robot. His partner Detective Alexander Holmes (Richard B. Shull) had a tendency to get his partners hurt; thus, he finds out quickly when Yo-Yo is unhurt in one of their capers. Clearly, not much hilarity ensued on their capers because it only lasted 13 episodes.
(Image courtesy of Star Stills)