Richard Roundtree says no words in this film
Glenn Ford was paid $100,000 for just 2 days work.
Jill St John was the original female lead but walked when her salary hadn't been deposited in her account.
In the first beach scene, one of the speedboat thugs is wearing a "Black Whale III" T-Shirt. This shirt was worn by Miguel Ángel Fuentes in the movie Le mystère du triangle des Bermudes (1978) as it was the name of the boat in the movie.