The daughter-in-law of a prestigious family enlists Jennifer's help with a mysterious puzzle box that her mother-in-law left behind.
Unfortunately the movie Garage Sale Mysteries: The Pandora's Box Murders is not yet available on HBO Max.
| Production | Michael Shepard | Executive Producer |
| Production | Alan Ett | Executive Producer |
| Production | Jonathan Axelrod | Executive Producer |
| Production | Harvey Kahn | Executive Producer |
| Production | Jamie Lake | Supervising Producer |
| Production | Marnie Termuende | Executive Producer |
| Production | Jackie Lind | Casting |
| Editing | Nicole Ratcliffe | Editor |
| Art | Jill Scott | Production Design |
| Production | Allen Lewis | Supervising Producer |
| Production | Katy Garretson | Supervising Producer |
| Production | Lori Loughlin | Executive Producer |
| Production | Harvey Kahn | Producer |
| Production | Bianca Versteeg | Associate Producer |
| Crew | Donavin Kuhl | Stunt Double |
| Production | Gill Kennedy | Payroll Accountant |
| Art | Mark Boyko | Set Decoration |
| Sound | Jay Cheetham | Sound Editor |
| Lighting | Geoff Dane | Gaffer |
| Production | Patrick Tozer | Assistant Production Coordinator |
| Crew | Dean Fitzpatrick | Transportation Coordinator |
| Editing | Amanda Colquhoun | Assistant Editor |
| Editing | Cassandra Yaseniuk | Online Editor |
| Sound | Karla Melendez | Dialogue Editor |
| Crew | Hugo Steele | Stunt Coordinator |
| Camera | Corey Tremblay | Key Grip |
| Directing | Bill Mizel | First Assistant Director |
| Art | Sheldon Feyter | Assistant Set Decoration |
| Crew | Marnie Termuende | Production Controller |
| Crew | Zandara Kennedy | Stunt Double |
| Camera | Owen Wong | First Assistant "A" Camera |
| Directing | Natalie Catherine | Script Supervisor |
| Costume & Make-Up | Shelly E. Jones | Key Hair Stylist |
| Costume & Make-Up | Jenni Macdonald | Assistant Makeup Artist |
| Crew | Brett Armstrong | Stunt Coordinator |
| Costume & Make-Up | Jillian Tymos | Assistant Hairstylist |
| Camera | Ryan Plummer | Still Photographer |
| Sound | Matthew Cameron | Production Sound Mixer |
| Directing | Grant O'Kane | Second Assistant Director |
| Costume & Make-Up | Jennifer Kaminski | Key Makeup Artist |
| Camera | David Tenniswood | "B" Camera Operator |
| Production | Svatia Sakarova | Production Accountant |
| Crew | Stefano Chimarios | Transportation Captain |
| Editing | Eugen Mihalicka | Assistant Editor |
| Visual Effects | Barry Liu | Visual Effects Supervisor |
| Sound | Alex Macia | Foley Artist |
| Camera | Jenna Fuoco | "A" Camera Operator |
| Production | Geoffrey Dodd | Location Manager |
| Costume & Make-Up | Emily Gray | Costume Designer |
| Costume & Make-Up | Rachel Zaharik | Costume Set Supervisor |
| Art | John Morstad | Property Master |
| Editing | Jimmy Hsu | Colorist |
| Crew | Larissa Stadnichuk | Stunt Double |
| Production | Sara Brown | Extras Casting |
| Sound | Bryce Raffle | Boom Operator |
| Production | Chidem Alie | Production Coordinator |
| Production | Jamie Lake | Production Manager |
| Art | Gillian Cole | Art Direction |
| Camera | Alana Thorburn-Watt | First Assistant "B" Camera |
| Sound | Miguel Nunes | Supervising Sound Editor |
| Production | Susan Messent | Assistant Accountant |
| Crew | Jason Macintyre | Post Production Supervisor |
| Production | Nikki Lee | Post Production Coordinator |
| Sound | Ryan Thompson | Sound Designer |
| Sound | Devon Quelch | Foley Artist |
| Sound | Miguel Nunes | Sound Re-Recording Mixer |
| Camera | Randal Platt | Director of Photography |
| Sound | Terry Frewer | Original Music Composer |
| Directing | Neill Fearnley | Director |
| Writing | Kraig Wenman | Screenplay |
| Writing | Suzi Weinert | Novel |