First feature-length film shot in SuperCinecolor.
William Conrad ("The Major"), looking very Orson Welles-ian, hasn't much dialogue to show off his distinctive voice, which was used to narrate many movies, and he appeared on many radio shows. He would become well known for his roles in the detective shows Cannon (1971) and Jake and the Fatman (1987).
When she first meets the Emperor, the heroine is introduced as Lady Christianne Morrel. "Morrel" is the name of a family that helps and supports Edmond Dantè, the Count of Monte Cristo of the original novel.