A journalist investigates a series of murders that follows the discovery of an unpublished novel by Charles Dickens in the cellar of an old Thames pub.
Unfortunately the movie The Riddle is not yet available on HBO Max.
| Directing | Brendan Foley | Director |
| Writing | Brendan Foley | Author |
| Art | Matthew Button | Art Direction |
| Production | Lars Hermann | Producer |
| Crew | Norman Kelly | Stunts |
| Costume & Make-Up | Angela Billows | Costume Design |
| Production | Donald A. Starr | Executive Producer |
| Crew | Steve Gunn | Stunts |
| Production | James Hollond | Executive Producer |
| Crew | Joe Condren | Stunt Coordinator |
| Production | Mark Moriarty | Producer |
| Art | Belinda Cusmano | Set Decoration |
| Production | Daniel J.B. Taylor | Executive Producer |
| Crew | Mark Moriarty | Cinematography |
| Production | Peter Burrell | Producer |
| Editing | Ross Bradley | Editor |
| Production | Ed Harper | Line Producer |
| Production | Chris Chrisafis | Producer |
| Crew | Tony Condren | Stunts |
| Crew | Cornelius Carr | Stunts |
| Sound | Graham Slack | Music |
| Production | Joe Condren | Producer |
| Art | Michael Kane | Production Design |
| Production | Brendan Foley | Producer |
