Jag såg samma film som ett barn och tyckte verkligen om det! Efter mycket googling tror jag att det var den tyska tv-filmen 1977, Operation Ganymed . Den här länken är en tysk version av sidan, men det finns en IMDB-sida med en sammanfattning på engelska:
A spaceship returns to Earth after several years of space exploration and finds it desolate. Landing in what they believe is Mexico, the crew decides to travel north, and try to find out what happened to Earth during the years they were gone.
Enavanvändarrecensionernanämnerderasuppdelning:
Five astronauts return to earth after more than four years on a catastrophically failed mission to Ganymede during which 21 of their team perished. When no one answers their calls, they perform an emergency landing in the ocean and finally get to a rocky desert coast that looks much like a strange planet. While they did find some evidence of life on Ganymede, they have a hard time doing so on Earth, until they surmise that the human race must have destroyed itself in a nuclear war. Their despair over the apparent utter futility of all that they have endured leads them to madness, murder and cannibalism.
EnengelskdubblettavfilmenfinnspåYoutube: