Robin Phillips
Paul Pennyfeather
Michael Elwyn
Alastair Vane-Trumpington
Donald Wolfit
Dr. Augustus Fagan
Leo McKern
Captain Grimes
Geneviève Page
Margot Beste-Chetwynde
Felix Aylmer
Judge
Colin Blakely
Solomon Philbrick
Robert Harris
Prendergast
Griffith Jones
Sir Humphrey Maltravers
Patrick Magee
Maniac
Paul Rogers
Chief Warder
Donald Sinden
The Prison Governor
Rodney Bewes
Arthur Potts
Roland Curram
Otto Silenus
Patience Collier
Flossie Fagan
Jack Watson
Gallery Warder
Kenneth Griffith
Mr. Church
Helen Christie
Mrs. Clutterbuck
Michael Newport
Lord Tangent
Duncan Lamont
Inspector Bruce
Clifton Jones
Chokey
Joan Haythorne
Miss Hart
Jeremy Child
Nigel
John Cater
Blackall
Roy Beck
Public Schoolboy (uncredited)