Goodbye Gemini on AllMovie

Two 20 year old twins have a bizarre incestuous relationship. Julian (Martin Potter) and his sister Jacki (Judy Geeson) carry on the affair and only reveal their secrets to a stuffed teddy bear named Agamemnon. While their father is absent, they murder the housekeeper and run wild at night. Drugged out parties with transvestites and homosexuals leads to blackmail, debauchery and murder. Julian soon finds himself unable to escape the dark and strange world and finds his fantasies have becomes his worst nightmares. Michael Redgrave appears briefly as a member of Parliament.