Prisoners Of The Lost Universe

Prisoners of the Lost Universe is a 1983 British science fiction action film. Three people are transported to a parallel universe when an earthquake occurs just as the scientist is experimenting with his matter transmitter. The trio must escape the strange world of Vonya while dealing with a number of villains.

Three people are transported into a parallel reality, where they find they must use modern technology, but medieval weapons, in order to save the citizenry from a murderous warlord.