The Third Secret_
"The Story of a Man Searching for a Killer Who Might Be Himself!"
A prominent London psychologist seems to have taken his own life, causing stunned disbelief amongst his colleagues and patients. His teenage daughter refuses to believe it was suicide as this would go against all of the principles her father stood for, therefore she is convinced it was murder. She enlists the help of a former patient to try to get to the truth. However, the truth turns out to be both surprising and disturbing.
Starring
Stephen Boyd, Jack Hawkins, Richard Attenborough
Updated Feb 16, 2026
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Year context
The Third Secret was released 62 years ago in 1964.
Overview
A prominent London psychologist seems to have taken his own life, causing stunned disbelief amongst his colleagues and patients. His teenage daughter refuses...
The Third Secret is a Mystery, Thriller, Drama film with a runtime of 1h 43m.
CAST (20)
Stephen Boyd
Alex Stedman
Jack Hawkins
Sir Frederick Belline
Richard Attenborough
Alfred Price-Gorham
Diane Cilento
Anne Tanner
Pamela Franklin
Catherine Whitset
Paul Rogers
Dr Milton Gillen
Alan Webb
Alden Hoving
Rachel Kempson
Mildred Hoving
Peter Sallis
Lawrence Jacks
Patience Collier
Mrs Belton
Freda Jackson
Mrs Bales
Judi Dench
Miss Ada Humphries
Peter Copley
Dr Leo Whitset
Nigel Davenport
Lew Harding
Charles Lloyd Pack
Dermot McHenry
Barbara Hicks
Police Secretary
Ronald Leigh-Hunt
Police Officer
GA
Geoffrey Adams
Floor Manager
James Maxwell
Mark
GC
Gerald Case
Mr Bickles
DETAILS
FREQUENTLY ASKED QUESTIONS
What is The Third Secret about?
A prominent London psychologist seems to have taken his own life, causing stunned disbelief amongst his colleagues and patients. His teenage daughter refuses to believe it was suicide as this would go against all of the principles her father stood for, therefore she is convinced it was murder. She enlists the help of a former patient to try to get to the truth. However, the truth turns out to be both surprising and disturbing.
How long is The Third Secret?
The Third Secret has a runtime of 103 minutes (1h 43m).
Who stars in The Third Secret?
The cast of The Third Secret includes Stephen Boyd, Jack Hawkins, Richard Attenborough, Diane Cilento, Pamela Franklin.
What is the rating of The Third Secret?
The Third Secret has a rating of 6.1 out of 10 based on 29 votes on TMDB.
GENRES (3)
Mystery
Thriller
Drama