From the time this movie was conceived, it was reportedly only eight weeks later that the completed movie was playing in theatres.
The control panel with many toggle switches used by the ground controller and the spacecraft flight crew is the automatic pilot from a WWII B-17 bomber.
Footage of the assembled Project Sigma spaceship was re-used in several Irwin Allen productions, including Lost in Space (1965) and Au coeur du temps (1966).
The car Dr. Van Ponder drives is a 1957 Lincoln Premiere convertible.