cast
- Leslie Banks
- Bob Lawrence
- Edna Best
- Jill Lawrence
- Peter Lorre
- Abbott
- Frank Vosper
- Ramon Levine
- Hugh Wakefield
- Clive
- Nova Pilbeam
- Betty Lawrence
- Pierre Fresnay
- Louis Bernard
- George Curzon
- Gibson
- Cicely Oates
- Nurse Agnes
- D.A. Clarke-Smith
- Insp. Binstead
- Henry Oscar
- Dentist
crew
- Alfred Hitchcock
- Director
- Michael Balcon
- Producer
- A.R. Rawlinson
- Screenwriter
- Charles Bennett
- Screenwriter
- D.B. Wyndham-Lewis
- Screenwriter
- Edwin Greenwood
- Screenwriter
- Emlyn Williams
- Screenwriter
- Curt Courant
- Cinematographer
- Arthur Benjamin
- Composer (Music Score)
- Louis Levy
- Musical Direction/Supervision
- Hugh Stewart
- Editor
- Alfred Junge
- Art Director, Set Designer
- Peter Proud
- Art Director, Set Designer
 - Cast and Crew - AllMovie &p[summary]= &p[url]=http%3A%2F%2Fwww.allmovie.com%2Fmovie%2Fthe-man-who-knew-too-much-v31107%2Fcast-crew &p[images][0]=http://cps-static.rovicorp.com/1/adg/cov75/drt000/t011/t01164fhsux.jpg?partner=allrovi.com){kind=link}