The Third Alibi
movie

Released March 15, 1961
Overview
A composer (Laurence Payne) is stuck in a middle-class marriage and finds that his affair with his wife's half-sister (Jane Griffiths) has resulted in a pregnancy. When his wife refuses to give him a divorce he hatches a murder scheme that is too clever by half.
Cast

Laurence Payne
as
Norman Martell

Patricia Dainton
as
Helen Martell

Jane Griffiths
as
Peggy Hill

Edward Underdown
as
Dr. Peter Murdoch

John Arnatt
as
Supt. Ross

Humphrey Lestocq
as
Simmons, the Producer

Lucy Griffiths
as
Miss Potter
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Olive Milbourne
as
Mrs. Booth

Arthur Hewlett
as
Marshall

Annette Kerr
as
Cinema cashier

Cleo Laine
as
Cleo

Dudley Moore
as
Rehearsal Pianist (Uncredited)
Crew
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Evelyn Gibbs
as
Wardrobe Master

Montgomery Tully
as
Director
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Maurice J. Wilson
as
Screenplay

Montgomery Tully
as
Screenplay
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Philip Baker
as
Theatre Play
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Jane Baker
as
Theatre Play
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Jim Connock
as
Editor
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John Shinerock
as
Camera Operator
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Maurice J. Wilson
as
Producer
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Don Banks
as
Original Music Composer
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Walter J. Harvey
as
Director of Photography
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William Hutchinson
as
Art Direction