Goodbye Gemini (1970)

Goodbye Gemini is a 1970 British horror thriller film.

Plot
Unnaturally close, jet-setting twins become enmeshed in the Swinging London scene, where their relationship is strained after they befriend a predatory hustler and his girlfriend.

Cast

 * Judy Geeson as Jacki
 * Martin Potter as Julian
 * Michael Redgrave as James Harrington-Smith
 * Mike Pratt as Rod Barstowe
 * Alexis Kanner as Clive Landseer
 * Freddie Jones as David Curry
 * Marion Diamond as Denise Pryce-Fletcher