Escape Through Time (1993)

Some time in the 21st century, Kovarick, said to be the most evil man who ever lived, is met by a resistance force. One of their members, Dr. Bahler, invents a time distorter held within a ring, which he uses to go back to ancient Egypt, where he dies. 75 years before he left, the ring is found by scientists, who are killed by a small mafia group, but not before it is thrown to a bum, who pawns it for fifty cents. An obnoxious gentleman, Steve, then buys it to give to Jill, a local actress he has fallen for, but does not reciprocate. The mob boss attends her performance to get the ring back, and when he threatens to kill her, an interjection creates a paddageway to the middle ages, and she and her airy friend Kirsten go through. In the middle ages, their princess costumes make everyone mistake them for fleeing princesses who had been forced to marry ogre-like men for acquisition of land. Eventually, they escape the pursuing mob to the old west, where Wild-Eyed Cody and his men have come to loot the town, confronted by a loony sheriff and "Calamity" Jill, refusing to wear townlady's clothes and instead claiming to be a cousin to "Calamity" Jane. The distorter is set to return to its point of origin, so after trouble strikes again, Jill unknowingly repeats the interjection, and returns to Kovarick's future, again with Kirsten and still pursued by the mob, who side with Kovarick. The resistance force realizes there is not enough power left in the ring to allow their plan to work without forcing Jill and Kirsten to stay in the future, so the two decide to help in whatever way they can before returning...