 Kenneth MoreRichard Hannay | Richard Hannay |
 Taina ElgMiss Fisher | Miss Fisher |
 Brenda De BanzieNellie Lumsden | Nellie Lumsden |
 Barry JonesProfessor Arthur Logan | Professor Arthur Logan |
 Reginald BeckwithLumdsen | Lumdsen |
 Faith BrookMandy Robinson ("Nannie") | Mandy Robinson ("Nannie") |
 Michael GoodliffeBrown | Brown |
 James HayterMr Memory | Mr Memory |
 Duncan LamontNot listed | Not listed |
 Jameson ClarkMacDougal | MacDougal |
 Andrew CruickshankSheriff | Sheriff |
 Leslie DwyerMilkman | Milkman |
| BBetty HendersonMrs, MacDougal | Mrs, MacDougal |
 Joan HicksonMiss Dobson | Miss Dobson |
 Sidney JamesPerce Baker | Perce Baker |
 Brian OultonNot listed | Not listed |
 Barbara SteeleExtra | Extra |
 Marianne StoneHospital Administrator (uncredited) | Hospital Administrator (uncredited) |
 Jill HaworthSchoolgirl on Train (uncredited) | Schoolgirl on Train (uncredited) |
 Peter Vaughan2nd Police Constable on Train (uncredited) | 2nd Police Constable on Train (uncredited) |
 Carol WhiteSchoolgirl in Assembly Hall (uncredited) | Schoolgirl in Assembly Hall (uncredited) |
| BBill SimpsonBridegroom (uncredited) | Bridegroom (uncredited) |
 Sam KyddTrain restaurant staff (uncredited) | Train restaurant staff (uncredited) |
 Michael BrennanDetective on Train (uncredited) | Detective on Train (uncredited) |
 Bruce SetonPoliceman on Train (uncredited) | Policeman on Train (uncredited) |
| MMargot BoydNot listed | Not listed |
| JJohn GrieveNot listed | Not listed |
