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