Hamraaz
Kumar, a stage actor, gets suspicious of his wife, who starts behaving strangely. Things take a drastic turn when she is found dead.
Starring S.N. Banerjee, Urmila Bhatt, Birbal, Sunil Dutt, Ratan Gaurang, Anwar Hussain, Vimi, Raaj Kumar, Manmohan Krishna, Balraj Sahni
Watch "Hamraaz" from streaming services Plex Free, Amazon released in 1967. It's a thriller and music movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.