Prisoners of the Lost Universe
This low-budget film is about a scientist (Kenneth Hendel) and two other people (Kay Lenz and Richard Hatch), in the wrong place at the wrong time, who are transported to another world in another dimension when an earthquake occurs just as the scientist is experimenting with his "matter" transmitter. As the transmitter beeps and flashes, the trio end up in the strange world of Vonya (which looks very much like the African plains where this film was shot, and where everyone speaks English). Their main objective is to escape back to Earth, but in the meantime, they have several comic-book style villains to handle, of course.
Director: Terry Marcel
Starring: Kay Lenz, Richard Hatch,John Saxon, Dawn Abraham