Gumnaam

A group of strangers - Asha (Nanda), Anand (Manoj Kumar), Rakesh (Pran), Dr. Acharya (Madan Puri), Kitty (Helen), Kishan (Manmohan), Dharamdas (Dhumal) & Madhusudan Sharma (Tarun Bose) - become marooned on a desolated island after a plane carrying them dumps them there & scrams. They find an old manor on the island, where a butler (Mehmood) greets them upon arrival & appears to have been waiting for them. However, the group is soon overcome with fear as they are killed off one by one by someone. (Summary by iceblox)