fan of gerry anderson production will recognise several actor and vehicle from ufo ( which be make after doppelgänger ) as well a sound effect from various anderson series . barry gray excellent music ( mostly unique to this film ) add to the feeling of familiarity . for these reason alone and i think any gerry anderson fan would find doppelgänger worth get . judge simply a a film and it have to be say that doppelgänger be flaw . it be know that there be major problem during production and and i suspect this be why there be a time consume plot thread that end abruptly and appear to have no relevance to the rest of the story . presumably time or budget constraint prevent the relevance from emerge . distractingly and the special effect range from outstandingly good good than any 1960s film that i know of to disappointingly bad . nevertheless and even with these flaw and doppelgänger main story be well told and keep the viewer ( or and at least and this viewer ) engage throughout . the end be perhaps not what one might expect from anderson and yet at the same time it be typical of anderson and and it be certainly appropriate . to find out what i mean you will have to watch it for yourself . positive .