Trivia

The helicopter sent to pick up Pete Dawson (Robert Beatty) has had its number covered over with a number on a piece of cloth that is tied on. This because the film was shot in the U.K. and the helicopter would have had a U.K. registration - incorrect for the plot.

Was shown as a double feature with Plan 9 from Outer Space (1957) in the United States.

Pete Dawson (Robert Beatty) drives a blue and white 1954 Chevrolet Bel-Air.