Colonels Lake and Straker are found unconscious by the their car by SHADO. When they come to, they tell of their harrowing adventure--which is shown in a long flashback.
Their adventure begins when the two are driving along a country road when they are attacked by a UFO. They escape but when they get back to SHADO headquarters, the place seems mostly frozen in time. That's because although everyone is frozen like statues and some things can't be moved or manipulated, other things can. In the midst of this bizarre setting, a SHADO agent (Turner) suddenly appears and begins taunting them. It seems Turner is working for the aliens and is quite cocky about his new powers, as all this is apparently happening during just an instant of time. So, much of the show is a cat & mouse game where it appears Turner is just having fun before he ultimately kills them. But, since Straker is the star of the show and Lake is in quite a few episodes, you KNOW that eventually the tide will change and the good guys will prevail--especially sine there are still eight more episodes to go in the series! In some ways, this episode is reminiscent of one from the original "Star Trek" TV series--the one where begins who travel MUCH faster than humans take control of the Enterprise. These beings, because they travel so fast, cannot be perceived by the human eye and appear unstoppable. But, like the aliens here in "UFO" they are--as, once again, evil cannot win or the series would be completed prematurely. This takes away a bit of the suspense, but such is the hazard of putting the leads in ANY dangerous plot. Had they chosen a 'no name', it might and not done it as a flashback, it might have worked a tad better. Still, it's not bad--a pretty average but very watchable episode. My only reservation and reason I didn't score this one even higher is near the end there is a very silly scene involving toy-like cars and a chase. Frankly, it looked a lot like the game "Mario Cart" but done at very low speed! How did THIS get in the episode and who that it was a good idea?!