Young was best known, however, for "Mister Ed" (1961–66), a CBS television show, in which he starred as Wilbur Post, the owner of Mr. Ed, a talking horse who would not talk to anyone but him, thus causing comic situations for Wilbur Post, with his wife, neighbors, and acquaintances. In 1962 while not filming "Mister Ed" Young appeared as John Stetson (inventor of the famous western Stetson hat) on "Death Valley Days" in the episode "The Hat that Won the West." He also starred as Stanley Beamish in the unaired 1966 pilot episode of "Mr. Terrific", but apparently declined to appear in the broadcast series in 1967 that followed. In the late 1960s, he retired from acting for several years. During that time, he founded a broadcast division for the Christian Science Church.