Edwina Black, een langdurig zieke vrouw, overlijdt plotseling. Bij lijkschouwing stelt dokter Septimus Prendergast vast dat haar lichaam een dodelijke dosis arsenicum bevat. De verdenking valt op Edwina's man en onderwijzer Gregory, Gregory's maîtresse Elizabeth Grahame en Edwina's huishoudster Ellen. De aan thee verslaafde en trage inspecteur Martin van Scotland Yard krijgt de opdracht de dader te vinden.
Ja! de film The Late Edwina Black is nu beschikbaar om te kijken op Netflix in Nederland.
| Directing | Maurice Elvey | Director |
| Writing | Charles Frank | Screenplay |
| Writing | David Evans | Screenplay |
| Writing | William Dinner | Theatre Play |
| Writing | William Morum | Theatre Play |
| Production | Ernest Gartside | Producer |
| Sound | Allan Gray | Original Music Composer |
| Camera | Stephen Dade | Director of Photography |
| Editing | Douglas Myers | Editor |
| Art | George Provis | Art Direction |
| Costume & Make-Up | Elizabeth Haffenden | Costume Design |
| Costume & Make-Up | Aldo Manganaro | Makeup Department Head |
| Costume & Make-Up | Betty Sherriff | Hairstylist |
| Production | John S. Gartside | Production Manager |
| Directing | Kenneth Rick | Assistant Director |
| Directing | Buddy Booth | Third Assistant Director |
| Crew | Peter Mullins | Scenic Artist |
| Art | Edward Rodrigo | Property Buyer |
| Art | T.R. Seddon | Draughtsman |
| Sound | John Cox | Sound Recordist |
| Sound | Bert Ross | Sound Recordist |
| Sound | Alan Blay | Sound Engineer |
| Sound | Norman Daines | Sound Supervisor |
| Camera | Charles Earl | Camera Operator |
| Camera | Moray Grant | Camera Operator |
| Camera | Ceri Davies | Clapper Loader |
| Camera | Micky Dean | Focus Puller |
| Editing | Richard Marden | Assistant Editor |
| Editing | Don Terrett | Assistant Editor |
| Sound | Ludo Philipp | Conductor |
| Directing | Betty Harley | Continuity |
| Directing | Jean Dyball | Continuity |
| Production | Gilbert Mandelik | Production Executive |
| Crew | Vivienne Eden | Administrative Assistant |
