While searching through her late mothers attic, Rebecca uncovers sealed cards from a mysterious suitor that had been addressed to her widowed Mom over the past 12 Christmases. As she begins to wonder the identity of man, Rebecca hires a handsome, yet mysterious, detective to help solve the mystery behind the letters.
Unfortunately the movie A Christmas Mystery is not yet available on HBO Max.
| Writing | Joany Kane | Writer |
| Writing | Jeffrey Schenck | Writer |
| Directing | Peter Sullivan | Director |
| Writing | Peter Sullivan | Writer |
| Production | Barry Barnholtz | Executive Producer |
| Production | Zelma Kiwi | Executive Producer |
| Production | Jeffrey Schenck | Executive Producer |
| Production | Peter Sullivan | Co-Producer |
| Sound | Matthew Janszen | Music |
| Camera | Roberto Schein | Director of Photography |
| Editing | Randy Carter | Editor |
| Art | Chewie K. Darsow | Production Design |
| Art | Jackie Linke | Art Direction |
| Art | Catch Henson | Set Decoration |
| Costume & Make-Up | Lauren Morelli | Costume Design |
| Costume & Make-Up | Megan Nicoll | Key Makeup Artist |
| Costume & Make-Up | Katie Kilkenny | Makeup Artist |
| Costume & Make-Up | Adina Sullivan | Makeup Artist |
| Crew | Paul E. Short | Stunts |
