Trivia: John Bluthal has two roles in this movie. Not only does he play the Head Waiter, he is also the voice of Doctor Crow.
Trivia: The reconstruction of the Roman Forum at Las Matas for this film holds the record for the largest outdoor film set ever constructed. The various ancient Rome settings covered 55 acres.
Trivia: Raymond Huntley (Mr. Wedgewood) does not have a single word of dialogue in all of the three scenes he appears in.
Trivia: The final Bugs Bunny cartoon produced at Warner Brothers.
Trivia: This is the movie that officially kicked off the Showa kaiju cinematic universe.