Elmer Bernstein wrote an hour of music for this movie, much of it progressive and experimental, but most of it was unused after the opening sequences until the film's last half hour. Bernstein removed some of the cues after the film was extensively re-edited, because they did not work in truncated form, while others appear to have been removed by Producer and replacement Director Stanley Donen. The full score was released as a very Limited Edition CD in 2008, that is now deleted.
Executive Producer Lord Lew Grade (uncredited) had 2 scenes removed because he thought they were distasteful. In one scene, Hector mutilated Benson's corpse on a laboratory table. The other was a dream sequence in which Alex and Adam murder Benson.
A few years after the release of this movie, Farrah Fawcett was a guest on The Tonight Show Starring Johnny Carson (1962), in which Johnny casually poked fun at Fawcett's movie choices. "I remember you did a picture, I think it was called 'Saturn 3'." The audience laughed a bit as Fawcett squirmed, answering, "Originally they had a very good script, it was called 'The Helper', and it was a lot different from what we ended up shooting."
Asked about the original director,John Barry's abrupt departure, Stanley Donen said "It was my fault, not John's. The truth is, John had hardly ever been on a set, which I didn't realize. He was such a terrific talent, but he'd spent most of his time in an office. He knew next to nothing about staging a scene, or handling actors, and since nature hates a vacuum, the actors jumped on him. The film started floundering. Finally, I had to tell him 'It's not working. I'll have to be on the set with you'. I had a moral commitment, after all. I'd make sure the film went all right. But when I did turn up on the set, John said he just couldn't work like that, so he left. There was no question of his being fired."
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.
In his novel "Money," Martin Amis used a great deal of his experience as the screenwriter for this film as the basis of the book. The director, John Self, is based on the film's original Director John Barry, and Lorne Guyland is meant as a caricature of Kirk Douglas, the aging star still trying to prove how sexy he was. Caduta bears some resemblance to Sophia Loren, who was not a member of the cast.