The Man Who Knew Too Much
When an American doctor and his former‑songstress wife stumble on a murder while vacationing in Morocco, they must outwit a shadowy conspiracy to rescue their kidnapped son before the deadly plot reaches them.
“A little knowledge can be a deadly thing!”
Synopsis
An American physician and his spouse, who was previously a singing star, observe a murder while on vacation in Morocco and become entangled in an international intrigue after their young son is abducted.
Credits
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How many hands made this film
The scale of the collaboration
A crew of 101+ credited
Why a floor?
This is a minimum, not a total. We only count the credits we’ve captured so far, and coverage is uneven — a blockbuster might show a few hundred names while another of the same size shows a couple dozen. The real crews all ran into the thousands. The number here only grows as full credits are enriched — so we frame it as a floor, never a headcount.
Craft leads on file
Edited by George TomasiniShot by Robert BurksScored by Bernard Herrmann
Box Office
1956 · Box office
💰 Box-office hit — grossed 9.4× its budget
Why 2.5×?
Cinemas keep roughly half of every ticket sold, and a wide release’s marketing often costs about as much again as the film — so a movie needs to gross around 2.5× its production budget just to break even theatrically. It’s a rule of thumb, not the studio’s ledger (home video and streaming come later).
Worldwide gross
$11.3M
Also known as
- Der Mann, der zuviel wusstede
- Der Mann, der zuviel wußtede
- L'Homme qui en savait tropfr
- L'uomo che sapeva troppoit
Community tags
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Cast & Crew
101 unique people credited
Top billed cast
Brenda De Banzie
as Lucy Drayton
Bernard Miles
as Edward Drayton
Ralph Truman
as Inspector Buchanan, Special Branch
James Stewart
as Dr. Benjamin McKenna
Doris Day
as Josephine Conway McKenna
Daniel Gelin
as Louis Bernard
Mogens Wieth
as Ambassador
Alan Mowbray
as Val Parnell
Hillary Brooke
as Jan Peterson
Christopher Olsen
as Hank McKenna
James Stewart Nm0000071
as Dr. Benjamin McKenna
Reggie Nalder
as Rien
Supporting cast
84Richard Wattis
as Assistant Manager
Noel Willman
as Woburn
Alix Talton
as Helen Parnell
Yves Brainville
as Police Inspector
Carolyn Jones
as Cindy Fontaine
Bernard Herrmann
as Conductor at Albert Hall (uncredited)
Patrick Aherne
as Handyman (uncredited)
Frank Albertson
as Taxidermist (uncredited)
Frank Atkinson
as Edgar (uncredited)
John Barrard
as Taxidermist Holding Panther (uncredited)
Mayne Lynton
as Grey-Haired Taxidermist (uncredited)
Clifford Buckton
as Sir Kenneth Clarke (uncredited)
Walter Bacon
as Church Member (uncredited)
Lovyss Bradley
as Church Member (uncredited)
Nora Bush
as Church Member (uncredited)
Ann Kunde
as Church Member (uncredited)
Jean Ransome
as Church Member (uncredited)
Albert Carrier
as French Policeman (uncredited)
Louis Mercier
as French Policeman (uncredited)
Anthony Warde
as French Policeman (uncredited)
Frank Baker
as Royal Albert Hall Attendee (uncredited)
Oliver Cross
as Royal Albert Hall Attendee (uncredited)
Sam Harris
as Royal Albert Hall Attendee (uncredited)
Jimmie Horan
as Royal Albert Hall Attendee (uncredited)
Carl M Leviness
as Royal Albert Hall Attendee (uncredited)
Lee Miller
as Royal Albert Hall Attendee (uncredited)
Arthur Tovey
as Royal Albert Hall Attendee (uncredited)
Harry Fine
as Edington (uncredited)
Alex Frazer
as Man in Box Office Lobby (uncredited)
Wolf Frees
as Prime Minister's Aide (uncredited)
Richard Marner
as Prime Minister's Aide (uncredited)
Milton Frome
as Embassy Back Entrance Guard (uncredited)
Walter Gotell
as Matthews, Scotland Yard Patrol Car (uncredited)
Leo Gordon
as Drayton's Chauffeur (uncredited)
Alfred Hitchcock
as Man in Marrakesh Marketplace (uncredited)
Gladys Holland
as Bernard's Date at Restaurant (uncredited)
George Howe
as Ambrose Chappell Sr. (uncredited)
Richard Wordsworth
as Ambrose Chappell Jr. (uncredited)
Eumenio Blanco
as Arab (uncredited)
Allen Jaffe
as Arab (uncredited)
Lou Krugman
as Marrakesh Headwaiter (uncredited)
Harold Kasket
as Stavis (uncredited)
Barry Keegan
as Patterson (uncredited)
Lloyd Lamble
as General Manager of Albert Hall (uncredited)
Lewis Martin
as Detective (uncredited)
Ralph Neff
as Drayton's Henchman (uncredited)
John O Malley
as Hotel Doorman (uncredited)
Eric Snowden
as Special Branch Officer (uncredited)
Patrick Whyte
as Special Branch Officer (uncredited)
Alma Taylor
as Embassy Guest (uncredited)
Guy Verney
as Embassy Footman (uncredited)
Peter Williams
as Police Sergeant at Albert Hall (uncredited)
John Marshall
as Embassy Butler (uncredited)
Alexis Bobrinskoy
as Foreign Prime Minister (uncredited)
Betty Baskcomb
as Edna (uncredited)
Hyma Beckley
as Albert Hall Audience (uncredited)
Paul Beradi
as Embassy Guest (uncredited)
Arline Bletcher
as Church Member (uncredited)
Janet Bruce
as Woman in Box Office Queue (uncredited)
Naida Buckingham
as Albert Hall Audience (uncredited)
Barbara Burke
as Miss Benson (uncredited)
Peter Camlin
as Marrakesh Waiter (uncredited)
Jimmy Charters
as Albert Hall Audience (uncredited)
Abdelhaq Chraibi
as Muslim Husband On Bus (uncredited)
Victor Harrington
as Embassy Guest (uncredited)
George Hilsdon
as Photographer at Airport (uncredited)
Philip Johns
as Embassy Chef (uncredited)
Barbara Jones
as Lady On Bus (uncredited)
Anthony Lang
as Singer in Choir (uncredited)
Donald Lawton
as Desk Clerk (uncredited)
Marion Lessing
as Church Member (uncredited)
Enid Lindsey
as Lady Clarke (uncredited)
Janet Macfarlane
as Albert Hall Audience (uncredited)
Edward Manouk
as Marrakesh Waiter (uncredited)
Lola Morice
as Singer in Choir (uncredited)
Leslie Newport
as Inspector at Albert Hall (uncredited)
Elsa Palmer
as Embassy Cook (uncredited)
Liddell Peddieson
as Taxidermist With Cap (uncredited)
Pauline Pfarr
as Ambassador's Wife (uncredited)
Arthur Ridley
as Albert Hall Ticket Collector (uncredited)
Lucile Sewall
as Church Member (uncredited)
Mahin S Shahrivar
as Muslim Wife On Bus (uncredited)
Guy Standeven
as Albert Hall Audience (uncredited)
Allen Zeidman
as Assistant Manager (uncredited)
Directors
1Writers
3Other crew
3Parents Guide
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