Inside an early 90's British sitcom (limited scenario, quick innuendo-laden dialogue) we find ourselves in a scene where a father and daughter trade overacted dialogue, to the laughter of a captive audience. When the lead character arrives with a recognizable catchphrase, all is on track as a normal episode - until the same character walks on from the other side of the set.
This opening period is a good start for the film, and is instantly recognizable as an only slightly exaggerated version of light entertainment from the period. The cast deliver it in the style of the period, and it is only the lead character (Tim) who seems not to totally fit in. The shift in tone when the duplicates start to arrive, is well handled (and occurs with a shift in ratio and appearance), but it is the brief period of trapped horror from Purnell that makes it really engaging (she is great throughout). It then gives way into a fairly disappointing conclusion, but its brevity and shock value help it. Enjoyable for what it was, although I wanted more of Purnell in the middle, and for a stronger third act.