The Ultimate Vampire Resource and Directory

This film chronicles the exploits of four astronauts, whose 1957 spaceship accidentally travels at incredible velocities as they return from a trip circling Mars. They are knocked unconscious, and land in a snow-covered area. They venture out, and discover that they have become become victims of time dilation and are in Earth's future. They theorize that humanity has been largely destroyed by a devastating atomic war in 2188 and that they are at least 200 years after that (they later learn the year is actually 2508). One of the four astronauts, Henry Jaffe, is particularly grief-stricken as he realizes that his wife and children have long since died without his being with them.