Second cinema film with the Doctor is better than the first, but suffers by being in essence a kiddie matinee film dealing with subjects like genocide, and not really being canonical Doctor Who. It all would have been much better just to have William Hartnell reprise his role on the big screen. It’s perfectly competent, and is an enjoyable bit of cheese today, but it does not succeed in its primary purpose.
Bill McGuffie’s jazzy score is good, but also at times wildly inappropriate for the subject. Madoc makes the most of his role as a human quisling; indeed the notion of humans collaborating with alien pepperpots is one of the few truly believable elements of the film. The Daleks label all their controls in English. Convienient! Oh, and apparently Bedfordshire is mountainous, as well.