From 1971 to 1977, Schuck appeared as San Francisco Police Detective Sergeant Charles Enright in the television series McMillan & Wife and also starred as an overseer in the miniseries Roots. In 1976, he played Gregory "Yo-Yo" Yoyonovich in the short-lived series Holmes & Yo-Yo; both it and McMillan & Wife had been created, and were produced, by Leonard B. Stern for what is now NBCUniversal Television. He starred in ABC's 1979 TV holiday special The Halloween That Almost Wasn't, a.k.a. The Night Dracula Saved the World, as the Frankenstein Monster. (He would again use the Universal International Frankenstein-monster makeup format in The Munsters Today; see below.) In 1979 John starred in a short-lived TV series version of Turnabout, in which he and Sharon Gless played a couple named Sam and Penny, who swap bodies. Some installments from that comedy series were reedited into the made-for-TV film Magic Statue, named for the artifact which caused the two to exchange bodies.