It stars Fred MacMurray, Barbara Stanwyck and Edward G. Robinson.
The movie was adapted by Billy Wilder and Raymond Chandler from the novel of the same title by
James M. Cain that first appeared in 1935 in abridged, 8-part serial form in Liberty Magazine.
It was directed by Wilder.

The story was based on a 1927 crime perpetrated by a married Queens woman and her lover.
Ruth (Brown) Snyder persuaded her boyfriend Judd Gray to kill her husband Albert, after having her spouse take out a big insurance policy—with a double-indemnity clause. The murderers were quickly identified and arrested.

Other films inspired by the Snyder-Gray murder include
The Postman Always Rings Twice and
Body Heat.
Both Postman and Double Indemnity were remade, with Double Indemnity being a "made-for-TV" movie in 1973. As I've said before re-makes seldom come up to the original.

The film tells the story of an insurance salesman (MacMurray) who finds himself entwined in a plot to kill a woman's husband. A tenacious investigator (Robinson) thinks it's foul play and may suspect the recently widowed femme fatale.

The title of the film is a reference to a frequently-found provision in many life insurance policies in which an amount twice the amount which would normally be paid to the beneficiary becomes payable in the event of the accidental death of the insured.

It stars
Fred McMurray as Walter Neff
Barbara Stanwyck as Phyllis Dietrichson
Edward G Robinson as Barton Keyes
Jean Heather as Lola Dietrichson
and is in B/W