| Person | Type | Job | Role(s) |
|---|---|---|---|
 Agatha Christie | Crew | Writing | Novel |
 Alan Brownie | Crew | Costume & Make-Up | Makeup Artist |
Allan McKeown | Crew | Costume & Make-Up | Hairdresser |
 Bernard Herrmann | Crew | Sound | Original Music Composer |
 Frank Launder | Crew | Production | Executive Producer |
Fred Carter | Crew | Art | Art Direction |
Harry Waxman | Crew | Camera | Director of Photography |
John Furniss | Crew | Costume & Make-Up | Costume Design |
John O'Gorman | Crew | Costume & Make-Up | Makeup Artist |
Leslie Gilliat | Crew | Production | Producer |
Roy Parkinson | Crew | Production | Production Supervisor |
 Sidney Gilliat | Crew | Directing | Director, Screenplay, Executive Producer |
Thelma Connell | Crew | Editing | Editor |
Thelma Graves | Crew | Production | Casting |
Wilfred Shingleton | Crew | Art | Production Design |
 Ann Way | Cast | Actress | Mrs. Philpott |
 Aubrey Richards | Cast | Actor | Dr. Philpott |
 Britt Ekland | Cast | Actress | Greta |
 David Bauer | Cast | Actor | Uncle Frank |
 David Healy | Cast | Actor | Jason |
 Ewan Roberts | Cast | Actor | Customer at Petrol Station (uncredited) |
 Geoffrey Chater | Cast | Actor | Coroner |
 George Sanders | Cast | Actor | Andrew Lippincott |
 Hayley Mills | Cast | Actress | Ellie Thomsen |
 Helen Horton | Cast | Actress | Aunt Beth |
 Hywel Bennett | Cast | Actor | Michael Rogers |
 Jim Brady | Cast | Actor | Workman (uncredited) |
 Leo Genn | Cast | Actor | Psychiatrist (uncredited) |
 Lois Maxwell | Cast | Actress | Cora |
 Madge Ryan | Cast | Actress | Michael's Mother |
Mischa De La Motte | Cast | Actor | Maynard |
 Nicholas Courtney | Cast | Actor | Second Auctioneer (uncredited) |
 Patience Collier | Cast | Actress | Miss Townsend |
 Per Oscarsson | Cast | Actor | Santonix |
 Peter Bowles | Cast | Actor | Reuben |
Robert Keegan | Cast | Actor | Innkeeper |
 Russell Waters | Cast | Actor | Waiter (uncredited) |
 Walter Gotell | Cast | Actor | Constantine |
 Windsor Davies | Cast | Actor | Sgt. Keene |
 Victor Harrington | Cast | Actor | Man at Auction (uncredited) |
Robert A. O'Neil | Cast | Broker | |
Reg Thomason | Cast | Actor | Doctor in Rembrandt Painting Mock-up (uncredited) |
Joe Phelps | Cast | Police Officer at Inquest (uncredited) | |
Charlie Gray | Cast | Actor | Man at Auction (uncredited) |
Stephanie Mildenhall | Cast | Child (uncredited) | |
| Person | Type | Job | Role(s) |
