Summary: Unnaturally close twin siblings Jacki and Julian become enmeshed in the swinging London scene, where they attract the attention of the heavily endebted gambler Clive. Seeing a way out of his debts, Clive sets Julian up for a blackmail scheme, setting in motion a nightmarish sequence of events. (imdb)

Genres: Drama, Suspense/Thriller, Crime, Horror

Country: UK

Directed By: Alan Gibson

Written By: Edmund Ward, Jenni Hall

Starring: Michael Redgrave, Freddie Jones, Peter Jeffrey, Martin Potter, Barry Scott, Judy Geeson, Brian Wilde, Alexis Kanner, Joseph Fürst, Laurence Hardy, Mike Pratt, Marian Diamond, Terry Scully, Daphne Heard, Ricky Renée

More information at the Internet Movie Database