Trivia

The house where the film was shot belonged to J.L.D. Morrison, who played enemy agent Brandt.

The title score, and much of the total score, was taken (uncredited) from Kronos (1957) by Bert Shefter and Paul Sawtell.

Filmed in 1956. May have been released for a short period in 1957, but general release was in 1959.

Director Jerry Warren married Brianne Murphy in Las Vegas in late 1956 and during their honeymoon there, he wrote the script for this movie. It was filmed over five days in early 1957 and may have been released before 1959.

The island and boat scenes were filmed at the Salton Sea so that location fees could be avoided.