The Sister in Law
movie

She Helped Her Husband Destroy His Brother By The Most Immoral Act Imaginable
Released April 25, 1975
Genres:
Overview
Robert and Edward are brothers involved in a web of adultery and deceit. They share Edward's wife and his mistress and a mission to deliver a package of jewels across the Canadian border, but the mission turns out to be deadly.
Cast

John Savage
as
Robert Strong

Will MacMillan
as
Edward Strong
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Anne Saxon
as
Joanna Strong

Meridith Baer
as
Deborah Holt

Frank Adonis
as
Benjo

Jonathan Oppenheim
as
Fat Man
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Tom Mahoney
as
Thin Man
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Jan DeCarlo
as
Mrs. Strong
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Jack Cooper
as
Mr. Strong
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Larry Sontag
as
Hood
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Gillian Gordon
as
Lena
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Michael Ruben
as
John Strong
Crew

Joseph Ruben
as
Director
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Hugh Little
as
Sound
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Felipe Borrero
as
Sound
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Hank Gotzenberg
as
Sound Editor
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Robert J. Rosenthal
as
Assistant Director
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Gillian Gordon
as
Script Supervisor
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Jonathan Noah Krivine
as
Unit Manager

John Savage
as
Original Music Composer
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Bruce G. Sparks
as
Director of Photography
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Michael Bane
as
Art Direction

Joseph Ruben
as
Writer

Joseph Ruben
as
Producer