 Tony RandallHercule Poirot | Hercule Poirot |
 Anita EkbergAmanda Beatrice Cross | Amanda Beatrice Cross |
 Robert MorleyCaptain Hastings | Captain Hastings |
 Maurice DenhamInspector Japp | Inspector Japp |
 Guy RolfeDr. Duncan Doncaster | Dr. Duncan Doncaster |
| SSheila AllenLady Diane | Lady Diane |
 James VilliersFranklin | Franklin |
 Julian GloverDon Fortune | Don Fortune |
| GGrazina FrameBetty Barnad | Betty Barnad |
 Clive MortonMister X | Mister X |
 Cyril LuckhamSir Carmichael Clarke | Sir Carmichael Clarke |
 Richard WattisWolf | Wolf |
 David LodgeSergeant | Sergeant |
 Patrick NewellCracknell | Cracknell |
 Austin TrevorJudson | Judson |
 Alison SeebohmMiss Sparks | Miss Sparks |
 Windsor DaviesDragbot | Dragbot |
 Sheila ReidMrs. Fortune | Mrs. Fortune |
 Drewe HenleyBowling Alley Attendant (uncredited) | Bowling Alley Attendant (uncredited) |
| SSally DouglasGlamorous Girl in Gaming Club (uncredited) | Glamorous Girl in Gaming Club (uncredited) |
 Margaret RutherfordMiss Jane Marple (uncredited) | Miss Jane Marple (uncredited) |
 Stringer DavisMr. Stringer (uncredited) | Mr. Stringer (uncredited) |
 Roger AvonDetective Sergeant (uncredited) | Detective Sergeant (uncredited) |
 John BennettWaiter (uncredited) | Waiter (uncredited) |
| CCharlie BirdTaxi Driver (uncredited) | Taxi Driver (uncredited) |
| RRobin BurnsUndertaker (uncredited) | Undertaker (uncredited) |
| PPauline ChamberlainGaming Club Patron (uncredited) | Gaming Club Patron (uncredited) |
| FFred DavisPoliceman (uncredited) | Policeman (uncredited) |
| JJack DearlovePoliceman (uncredited) | Policeman (uncredited) |
| EEden FoxMan Waiting for Bus (uncredited) | Man Waiting for Bus (uncredited) |
