Kenneth More

Richard Hannay

Acting

Taina Elg

Miss Fisher

Acting

Brenda De Banzie

Nellie Lumsden

Acting

Barry Jones

Professor Arthur Logan

Acting

Reginald Beckwith

Lumdsen

Acting

Faith Brook

Mandy Robinson ("Nannie")

Acting

Michael Goodliffe

Brown

Acting

James Hayter

Mr Memory

Acting

Duncan Lamont

Acting

Jameson Clark

MacDougal

Acting

Andrew Cruickshank

Sheriff

Acting

Leslie Dwyer

Milkman

Acting

Betty Henderson

Mrs, MacDougal

Acting

Joan Hickson

Miss Dobson

Acting

Sid James

Perce Baker

Acting

Brian Oulton

Acting

Barbara Steele

Extra

Acting

Marianne Stone

Hospital Administrator (uncredited)

Acting

Jill Haworth

Schoolgirl on Train (uncredited)

Acting

Peter Vaughan

2nd Police Constable on Train (uncredited)

Acting

Carol White

Schoolgirl in Assembly Hall (uncredited)

Acting

Bill Simpson

Bridegroom (uncredited)

Acting

Sam Kydd

Train restaurant staff (uncredited)

Acting

Michael Brennan

Detective on Train (uncredited)

Acting

Bruce Seton

Policeman on Train (uncredited)

Acting

Margot Boyd

Acting

John Grieve

Acting