Cast (17)
Kenneth More
Richard Hannay
Taina Elg
Miss Fisher
James Hayter
Mr Memory
Barry Jones
Professor Arthur Logan
Barbara Steele
Extra
Brenda De Banzie
Nellie Lumsden
Faith Brook
Mandy Robinson ("Nannie")
Joan Hickson
Miss Dobson
Sid James
Perce Baker
Leslie Dwyer
Milkman
Jameson Clark
MacDougal
Carol White
Schoolgirl in Assembly Hall (uncredited)
Betty Henderson
Mrs, MacDougal
Reginald Beckwith
Lumdsen
Marianne Stone
Hospital Administrator (uncredited)
Jill Haworth
Schoolgirl on Train (uncredited)
Peter Vaughan
2nd Police Constable on Train (uncredited)