Beyond the Time Barrier is a 1960 American Cold Warera black and white time travel science fiction film filmed in Texas in ten days. It starred and was produced by Robert Clarke and directed by Edgar G. Ulmer. Ulmers wife Shirley acted as a script editor while their daughter Arianne Arden appeared as a Russian pilot.
When Allison wakes, he finds himself in a dystopian underground city known as the Citadel. Unnerved by his captors refusal to speak with him, Allison initially reacts hostilely, but he eventually calms down and is brought to their leader, the Supreme. The Supreme explains that he and his second in command, the Captain, are the only two residents of the Citadel who are able to speak or hear. The rest of the inhabitants, including the Supremes granddaughter Trirene, are deafmutes, and everyone except possibly Trirene is sterile. A telepath, Trirene reads Allisons thoughts and indicates to the Supreme that she believes him not to be a spy, as the Captain suspects.The Captain sends Allison to be imprisoned with a group of a bald and violent mutants who are determined to kill everyone in the Citadel. As the mutants attack him, Allison overpowers one and demands answers. They claim to be the survivors of a cosmic plague, and they blame the residents of the Citadel for their problems. The Captain releases Allison and explains that Trirene has convinced the Supreme that he is not an enemy. Sensing his confusion, Trirene shows him historical photographs that help explain the Citadels history, and at his urging, leads him to the scapes, two scientists and a Russian woman officer. ........
Source: Wikipedia