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