The popularity of DVD has spawned a resurgeance in the output of old movies, and "When Worlds Collide" is one of the better old ones. Made when I was about 5 years old, I don't ever recall seeing it in a theater, nor on TV in subsequent years. But today, as a loan from my public library, here it is! Despite the defects on the film, on DVD it comes across as a colorful and fairly sharp picture. Sound is only mono. There are no extras.
This film dared to tackle the difficult question of what we would do if astromomers found a fast-moving star/planet system heading directly for Earth, and one large enough to destroy us. We have about 8 months, and the only hope for mankind as we know it is to quickly build a spaceship, select about 44 people to go along, plus a good variety of various types of livestock, blast off right before Earth is destroyed, attempt to land on the new planet, and hope that the atmosphere will support life. Quite a lot to ask for, especially in 1951!
As with other sci-fi films of that generation, you have the straightforward, unsmiling scientists, you have the wheelchair-bound selfish rich guy who will finance the spacecraft if he can save his own skin, you have the beautiful young lady who has no greater purpose than creating love tension among two of the main protagonists, and you have the kid rescued with his dog off a rooftop.
The film's strength is neither the Earth's destruction nor the arrival on the new planet. Rather it is the interplay among the scientists, governing bodies, and common folk wrestling with the idea that our home, Earth, may be destroyed and what we can or should do about it. What a concept, what a slim margin for error. New wall calendars are printed, and as each day is peeled off, you see how much time is left before the destruction. Signs posted at the spacecraft construction site say "Waste anything but time. Time is our most valuable resource." When the space travelers are chosen by lottery, one man chooses to stay behind because his fiance' can't go. Some angry non-winners begin to revolt.
major SPOILER - As the Earth is being destroyed, the spaceship starts gliding down its mile-long ramp (never mind the bad physics here) and then upwards into space. Later, while running out of fuel, they manage to make an awkward but safe landing on what now has to be their new home. There can be no escape. While one says "let's test the atmosphere before we open the door", the brave pilot says, "it's the only air we have, it doesn't matter" as he opens the door, then says, "It's the best air I've ever breathed." We see a beautiful, verdant landscape, although a very strange one, and we only can imagine what could have happened in futue generations in this new home for mankind.