UFO: Timelash (Episode 18)

Cmdr Ed Straker and Col Virginia Lake disappear and are discovered unconscious near the dead body of a Shado operative (Turner). Col Foster and co. try to understand what has happened. Straker picks up Lake at night, and as the pair drive they observe a UFO, which is following them, The UFO starts to attack them, and they radio for assistance, but are unable to contact SHADO HQ, and they drive off the road, under a tree, and when Straker says 'freeze', they're hit with some beam. When they arrive back at the studio gate, it's mid-day, with a bright sun, and they discover the base and surrounding area are frozen in time and space.