Austin Trevor
— Hercule Poirot
Jane Carr
— Lady Edgware / Carlotta Adams
Richard Cooper
— Captain Hastings
John Turnbull
— Inspector Japp
Michael Shepley
— Captain Ronald Marsh
Leslie Perrins
— Bryan Martin
C. V. France
— Lord Edgware
Sophie Stewart
— Geraldine Marsh
Brenda Harvey
— Miss Carroll
S. Victor Stanley
— Jobson
Phyllis Morris
— Ellis
Hargrave Pawson
— Donald Ross
Conway Dixon
— Sir Montague Corner
Stanley Vine
— Lord Edgware's Butler
Quinton McPherson
— Moxon
Kynaston Reeves
— Duke of Merton