Victor Lundin has recently (as of early 1999) written and recorded a "Robinson Crusoe on Mars" song.
A sequel titled "Robinson Crusoe in the Invisible Galaxy" was planned but it was scrapped due to the films lackluster box office.
Double-billed with Law of the Lawless.
Female simian astronaut Mona was played by a male Woolly Monkey named "Barney", who wore fur trunks to conceal that fact.
Many of the scenes of the Martian surface were filmed at Zabriskie Point in Death Valley, California.
The "air pills" were stock M&Ms, while the "poi sausages" harvested from the Martian plants were pepperonis.
The aliens are seen dressed in the spacesuits from Destination Moon
The lobby card for this movie has an official-looking statement: "This film is Scientifically Authentic ... It is only one step ahead of present reality!"
The Martian spacecraft are left-overs from The War of the Worlds. Director Byron Haskin was involved in both projects, although George Pal is often given sole credit for the earlier classic.
While filming in Death Valley, the cast and crew were ordered not to touch any of the plant life due to the fact that they were filming in a national park area and most of the plant life was federally protected.