This is actually a re-edited version of a film previously released in the U.S. as Voyage to the Prehistoric Planet (1965), which itself was an edited and dubbed version of the Soviet film Planeta bur (1962). For this version the already dubbed Russian footage was re-used but the American insert shots of Basil Rathbone and Faith Domergue were removed and new insert shots featuring Mamie Van Doren and other actresses (as inhabitants of Venus) were inserted. Director Peter Bogdanovich did the narration as if he were one of the cosmonauts telling the story in flashback. Some additional special effects shots from another Soviet production, Battle Beyond the Sun (1959), were also added. For this version, the famous shot of the Venusian reflected in the pool of water was removed.
The "Prehistoric Women" do not appear in the original Russian film from which this was made.
Almost all the film footage before the first spaceship arrives at Venus (Prologue; radar antennas on Earth; space station "Texas"; blue rocket) did not appear in the original "Voyage to the Prehistoric Planet".
Mamie Van Doren told Femme Fatales magazine the wardrobe lady had a tough time finding sea shells big enough to cover her boobs.