"The Secret Partner," from 1961, is a nifty British film starring Stewart Granger, Haya Harareet, and Bernard Lee. Granger is a successful businessman, John Brent, who is being blackmailed by a dentist. The man knows that in the past, Brent went by another name and was caught embezzling. Because of all the money Brent spends on blackmail, his wife (Harareet) believes that there's another woman. When he has a party for business and tells people she's in Zurich, his wife returns and, in front of the guests, announces that she's leaving him.
When a safe at his business is robbed, suspicion falls on him because he is one of two people who have the combination. His office keys show filings from being copied. He denies ever giving anyone the combination or having the keys copied. The dentist, meanwhile, is having problems of his own - he's visited by a mysterious man who makes some demands of him.
Since it's to be the last case of a retiring detective superintendent (Lee), he's anxious to solve the robbery. It all seems a little too pat for him.
Nifty mystery with not only some twists, but an unexpected ending.
I really liked this film. Granger does a good job as the man with problems everywhere he looks. Harareet is beautiful, but doesn't have much of a role. Lee is likable as the retiring superintendent, reminding us that justice isn't always found in the courts.
Recommended.