Not the most catchy of movie titles, but I guess it does explain the basic premise, whereas Doppleganger is a bit more mysterious. Oh well, it was a good run while it lasted. Running time is listed as 98 minutes.
Although not the best thing Gerry Anderson ever did, it was a decent attempt at a live action "big screen movie" with pretty decent special effects and a reasonably well known cast including Roy Thinnes (TV Show The Invaders) as well as Patrick Wymark and Herbert Lom. Of course, much of this movie was a precursor to UFO, as it featured several prominent cast members including Ed Bishop and Ian Hendry. Some props and vehicles featured in the movie also ended up in UFO. Great late-night TV fare, and a pretty decent Barry Gray soundtrack.
This UK release hits store shelves 8 September 2008 for about £6.98.