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