Robert Stack later wrote, "I wore tights and sang a song, and if that wasn't enough to kill off an already ill-fated film, I don't know what else would."
Artwork on the poster shows a bare-chested Robert Stack with his clenched fist encased in an iron glove. In the movie, however, Stack is never seen without his shirt and is never shown wearing an iron glove.
Robert Stack says in his autobiography that during the shooting of a fencing scene between him and a stuntman, the latter was severely wounded in the face, with blood all over his head. But producer Sam Katzman insisted on filming to proceed, no matter the injured stuntman.