The helmet that Captain Talray carries under his arm is the same one used by Michael Rennie as Klaatu in The Day the Earth Stood Still (1951).
The white sports car driven by Big Bill Watkins was a 1954 Keiser-Darrin convertible. Harry Keiser had the body, with its unique sliding pocket doors, made by a kit car company out of 300 lbs of fiberglass. Keiser Darren folded in 1955 and most of the 455 models produced had a 2.6L 125 hp (95 mph) engine, except for the last 100, which Darren used the Cadillac V8 with 300 horses. Keiser was a Dutch engineer.
This is one of just a handful of films for which Lenny Bruce, best known for his irreverent, certainly controversial, stand-up comedy, contributed his writing talents.
Two years after this film, Anne Francis co-starred in a far more memorable science-fiction film: Forbidden Planet (1956).
As this was made by Panoramic Productions, an outfit set up by Leonard Goldstein to make low-budget features for Fox, it is one of the studio's few 1950s releases post-The Robe (1953) that is not in CinemaScope.