Original director John Barry had made his name as a set designer, and had been acclaimed for his work on Star Wars: Episode IV - A New Hope (1977) and Superman (1978). After he was removed from this movie, he was working as a second unit director on Star Wars: Episode V - The Empire Strikes Back (1980) when he collapsed on-set and died of meningitis.
Hector the robot stood over eight feet tall, and cost a little over $1 million to make.
Producer Lew Grade said he was disappointed with how this film turned out. He said it looked good on paper, but the project started to fall apart due to John Barry's inexperience, Kirk Douglas's ego running riot, Harvey Keitel's lack of cooperation, Farrah Fawcett's lack of character personality and mediocre acting, script problems, and poor planning. Grade said the film he agreed to fund and the end result were almost two different films. Fawcett has also hinted that the film came out different from how it was sold to her before production started.
Kirk Douglas thought the clothes he wore in this movie were so comfortable that he kept them after production wrapped.