
A seasoned homicide detective watches in horror as his glamorous, manipulative girlfriend murders her husband. While he wrestles with his own twisted affection for the dangerous woman, his naive younger brother is assigned to investigate the case, creating a tense clash of loyalty, experience, moral ambiguity and the fragile boundaries of family ties.
Does The Man Who Cheated Himself have end credit scenes?
No!
The Man Who Cheated Himself does not have end credit scenes. You can leave when the credits roll.
See current US streaming, rental, and purchase options for The Man Who Cheated Himself (1950) via JustWatch.
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HDExplore the complete cast of The Man Who Cheated Himself, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Marjorie Bennett
Muriel Quimby

Lee J. Cobb
Lt. Ed Cullen

Tito Vuolo
Pietro Capa

John Dall
Andy Cullen

Lisa Howard
Janet Cullen

Charles Victor
Attorney

Charles Arnt
Ernest Quimby (as Charles E. Arnet)

Robert Carson

Morgan Farley
Rushton

Alan Wells
Nito Capa

Jane Wyatt
Lois Frazer

Leah Baird

Terry Frost
Detective

Mimi Aguglia
Mrs. Capa

Howard Negley
Detective Olson

Bud Wolfe
Officer Blair

William Gould
Doc Munson

Mario Siletti
Machetti

Harlan Warde
Howard Frazer

Gordon Richards
Albert: the Butler

Art Millan
United Airlines Clerk
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Read the complete plot summary of The Man Who Cheated Himself, including all major events, twists, and the full ending explained in detail. Explore key characters, themes, hidden meanings, and everything you need to understand the story from beginning to end.
Set in San Francisco, this tense crime drama follows a wealthy socialite who moves through a web of desire, money, and danger when her marriage collapses. Lois Frazer, Jane Wyatt, is in the middle of a divorce from her fortune-hunter husband Howard Frazer, Harlan Warde. After she discovers a gun he once bought, she uses it to shoot him in front of the man who has become her new partner, Lt. Ed Cullen, Lee J. Cobb, a seasoned homicide detective with the San Francisco police. The act triggers a chain of upheaval: Cullen takes charge of the case, disposes of the weapon, and quietly moves the body, while Lois faces the consequences of a crime that could upend everything she’s built with her new life.
Cullen is assigned to investigate, and he is not alone—his younger brother, Andy Cullen, John Dall, who is newly minted in the homicide division, postpones his honeymoon to stay on the case and help with the tricky investigation. The film follows their partnership as it evolves under pressure, with the murder weapon turning up again in an entirely separate killing—this time used by a young troublemaker named Nito Capa, Alan Wells. The young suspect’s involvement becomes a pressing clue, and Cullen hopes to pin both murders on him to salvage Lois and himself from exposure, all while the clock ticks and the evidence mounts.
As the investigation tightens, Andy becomes more suspicious of his brother’s possible involvement in the earlier murder. His persistence leads to a clash of loyalties and a series of evasions and lies that threaten to reveal the truth. The tension peaks as Cullen, driven by desperation, physically subdues Andy, ties him up, and makes a difficult call to Lois to urge them to flee together. With roadblocks sealing the city, the two are forced into a dangerous game of escape and pursuit, a test of nerves that plays out against the backdrop of a city under siege by its own police force.
The chase comes to a head at a location the siblings once played near—the abandoned ruins of Fort Point under the Golden Gate Bridge. It’s a scene that blends memory with danger as the plan to vanish together falters in the face of police scrutiny. Ultimately, the fugitives are arrested, and the courtroom becomes the final arena for truth and consequence. Outside the courtroom, Lois makes a last, guarded offer to her lawyer—an offer to do anything to avoid conviction—while Ed, wearing defeat more than anger, shares a cigarette with her and gives her a final, wary glance that lingers after the gavel falls.

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