This intriguing story is set in the 1930s at a country house, where two amateur sleuths, Bobby Jones and Lady Frankie Derwent, try to unravel the mystery behind a tale of murder, suspense and false identities. And the only clues the two have to go on are the puzzling last words of a dying man. Featuring characters created by Agatha Christie, Why Didn't They Ask Evans is a classic crime thriller sure to please murder-mystery fans.
Unfortunately the movie Why Didn't They Ask Evans? is not yet available on HBO Max.
| Directing | John Davies | Director |
| Directing | Tony Wharmby | Director |
| Writing | Agatha Christie | Novel |
| Writing | Pat Sandys | Writer |
| Production | Tony Wharmby | Executive Producer |
| Production | Jack Williams | Producer |
| Sound | Joseph Horovitz | Original Music Composer |
| Camera | Mike Humphreys | Director of Photography |
| Editing | Ray Helm | Editor |
| Art | Bryan Bagge | Production Design |
| Art | Frank Nerini | Production Design |
| Production | Corinne Rodriguez | Casting |
| Costume & Make-Up | Penny Lowe | Costume Design |
| Costume & Make-Up | Pauline Green | Makeup Artist |
| Sound | Alan Mills | Sound |
