Pasajeros del tiempo

There are a zillion B&W sci-fi cheapies out there, and every one is somebody's favorite. This is one of mine.

Scientists working on a time-camera experiment discover that it's actually a portal. They step through it into the far future, where remnants of a high-tech civilization battle troglodytes for survival. The cave-dwelling good guys and their androgynous androids are engaged in a desperate race against time to build a rocket to take them away from the ruined Earth. Our time travelers fall in with them, fall afoul of them, fall in love with them... well, you know.

This movie is one of those irresistible gems where the real battle is between energetic actors, imaginative directors, and talented technical people who toil fearlessly against a low budget and cheap sets. But if you're a fan of the genre, give this a watch. You'll thank me.