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