One On Top Of The Other/Una Sull'altra (1969) | GIALLO/THRILLER/MYSTERY | FULL MOVIE

In San Francisco, Dr. George Dumurrier runs a clinic inherited from his father with his brother, Dr. Henry Dumurrier. George is trying to find an investor to save the clinic that has many debts. He lives in a fancy mansion with his estranged wife Susan Dumurrier, who is asthmatic and is very sick, and has a lover, the photographer Jane Bleeker. While traveling with Jane, George learns that Susan has died. Further, he discovers that Susan had a one-million-dollar life insurance in his name. One night, George is having dinner with Jane in a restaurant and receives a phone call. He goes to a night-club where he sees the stripper Monica Weston, who is identical to Susan but has green eyes. George is intrigued and has one-night stand with Monica, who is worshiped by her client Benjamin Wormser. Meanwhile the insurance company investigates the death of Susan and concludes that she was murdered. Inspector Wald is in charge to investigate who killed Susan and George is the prime suspect of the crime.

IMDb: https://www.imdb.com/title/tt0065148