Reparto
Kenneth More
Richard Hannay
Brenda De Banzie
Nellie Lumsden
Reginald Beckwith
Lumdsen
Faith Brook
Mandy Robinson ("Nannie")
Jameson Clark
MacDougal
Brian Oulton
Barbara Steele
Extra
Carol White
Schoolgirl in Assembly Hall (uncredited)
James Hayter
Mr Memory
Duncan Lamont
Jill Haworth
Schoolgirl on Train (uncredited)
Peter Vaughan
2nd Police Constable on Train (uncredited)
Sam Kydd
Train restaurant staff (uncredited)
Michael Brennan
Detective on Train (uncredited)
Bruce Seton
Policeman on Train (uncredited)
Taina Elg
Miss Fisher
Barry Jones
Professor Arthur Logan
Michael Goodliffe
Brown
Andrew Cruickshank
Sheriff
Leslie Dwyer
Milkman
Joan Hickson
Miss Dobson
Sidney James
Perce Baker
Marianne Stone
Hospital Administrator (uncredited)