This episode was filmed while Lucille Ball was doing the second season of "The Lucy Show."
The television series was produced by Desilu and filmed on the Desilu lot, run by Lucille Ball.
Lucille Ball had wanted to do the original film, but found she was pregnant and had to withdraw. She was replaced by Gloria Graham. The role Ball plays on this episode was written specifically for the series. In the film she was supposed to be Angel the elephant girl. Here she Kate, an equestrian who handles Sahara, the wonder horse.
Billy Mumy's "Lost in Space" co-star Marta Kristen (Judy Robinson) would also guest star on the "The Greatest Show On Earth" four months later.