I recall seeing this intriguing movie as a teenager on television in the 1970s, though didn't recall many details. It is an entertaining, and at times thought-provoking, science fiction tale that well combines live action with the model-work for which Gerry (Thunderbirds) Anderson is best known. The casting is very good, and Roy Thinnes is a charismatic lead. I would have liked a more thoughtful ending for Thinnes' character, and am not sure I will feel the need to re-watch this DVD. The DVD picture quality is excellent. If you haven't seen this movie before, don't watch the trailer provided on the DVD before doing so - it gives away too much of the plot. The trailer is the only special feature, apart from English subtitles.