Kathryn Vale is a reclusive ex-movie star with a dark secret and a daughter hoping to follow in her mother's movie-star footsteps. When Kathryn attempts to make a career comeback, she is threatened by an anonymous blackmailer. The resulting events force Kathryn to confront the truth about herself and those around her.
Unfortunately the movie The Devil You Know is not yet available on HBO Max.
| Directing | James Oakley | Director |
| Writing | Alex Michaelides | Writer |
| Production | Amanda Foley | Producer |
| Production | Dee Bagwell Haslam | Executive Producer |
| Production | Peter R. McIntosh | Producer |
| Production | James Oakley | Producer |
| Production | Michael Webber | Producer |
| Sound | Mark Sayfritz | Original Music Composer |
| Camera | Kenny Brown | Director of Photography |
| Editing | Luke Dye | Editor |
| Production | Lois J. Drabkin | Casting |
| Art | Sean Daly | Production Design |
| Art | Eric Dean | Art Direction |
| Art | Brandon Smith | Art Direction |
| Art | Annie Spitz | Set Decoration |
| Costume & Make-Up | Olivia Mori | Costume Design |
| Costume & Make-Up | Cira Lara | Makeup Artist |
| Costume & Make-Up | Joanna Raskin | Hairstylist |
