I think the TZ ep used the actual title “I Sing The Body Electric”. The early 80’s TV movie, which was quite good & more complete than the TZ ep, used that other unfortunate title.
My favorite 1980s TZ ep- the Truck Driver who shipped souls to Hell & found they may not deserve it, so he helps them escape.
“Why are you doing this, Mister? You could get in a lot of trouble.”
“Well, I remember in Sunday School, the teacher told a story about Jesus going to Hell between Good Friday & Easter Sunday to give souls there another chance. I figure I’m just continuing the tradition.”