Hollywood starlet Barbara Payton stars in this gripping sci-fi thriller, two brilliant scientists unlock the secret to duplicating life, only to find their actions have deadly consequences. When they use their invention to clone the woman they both love, a dangerous love triangle ensues. With mind-bending twists and a chilling exploration of human nature, Four Sided Triangle blends classic British sci-fi with psychological suspense, proving that some inventions are best left unexplored.  

Never before seen on Blu-Ray in the UK, Four Sided Triangle makes its debut as a brand-new Hammer 4K restoration from the original negative film elements. Co-written and directed by Hammer legend Terence Fisher.