Double Feature:
FIRST SPACESHIP ON VENUS (1959) Spacecraft travels to Venus to find it a radioactive mess from nuclear holocost. Vivid space adventure. East German/Polish film.
VOYAGE TO THE PREHISTORIC PLANET (1965) Soviet sci-fi with American segments tying it together. The American segments include sci-fi 50's queen Faith Domergue and Basil Rathbone. A ship lands on Venus and it's full of dinosaurs and a mysterious siren. Some of the dinosaur puppet effects are pretty good.
