Dr. Arthur Calgary visits the Argyle family to return an address book lost some time ago by Jack Argyle, only to find out that Jack has been executed for the murder of his mother. Calgary can prove that Jack was innocent. In spite of opposition from a hostile family, he is determined to solve the crime.
| Writing | Agatha Christie | Novel |
| Directing | Desmond Davis | Director |
| Writing | Alexander Stuart | Screenplay |
| Production | Yoram Globus | Executive Producer |
| Sound | Dave Brubeck | Original Music Composer |
| Camera | Billy Williams | Director of Photography |
| Production | Sue Whatmough | Casting |
| Art | Ken Bridgeman | Production Design |
| Editing | Timothy Gee | Editor |
| Art | Richard Hornsby | Art Direction |
| Production | Jenny Craven | Producer |
| Production | Menahem Golan | Executive Producer |
| Production | Michael J. Kagan | Associate Producer |
| Directing | Alan Birkinshaw | Director |
| Costume & Make-Up | Gwenda Evans | Costume Design |
| Sound | Robin Gregory | Sound Mixer |
| Costume & Make-Up | Wally Schneiderman | Makeup Supervisor |
| Costume & Make-Up | Sue Love | Hairdresser |
| Directing | David Tringham | First Assistant Director |
| Directing | Michael Stevenson | Second Assistant Director |
| Directing | Ken Shane | Third Assistant Director |
| Sound | Derek Ball | Sound Mixer |
| Sound | Peter Horrocks | Sound Editor |
| Sound | John Ireland | Sound Editor |
| Visual Effects | Garth Inns | Special Effects Supervisor |
| Crew | Martin Grace | Stunt Coordinator |
| Editing | Chris Blunden | First Assistant Editor |
| Sound | Michael Linn | Music Editor |
| Production | Glynn Purcell | Location Manager |
| Art | Ernest Vincze | Title Designer |
