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