The Good Sister follows a couple who is working to put their crumbling marriage back together, when the wife receives a letter informing her that she has a long-lost twin sister. First thinking that the new family member will bring the couple closer together, the husband then begins an affair with the sister and discovers that she is treacherous and dangerous.
Unfortunately the movie The Good Sister is not yet available on HBO Max.
| Directing | Philippe Gagnon | Director |
| Writing | Pablo F. Fenjves | Writer |
| Production | Jean Bureau | Executive Producer |
| Costume & Make-Up | Anie Fisette | Costume Design |
| Production | Kaleigh Kavanagh | Associate Producer |
| Production | Ian Whitehead | Producer |
| Editing | Chantal Lussier | Editor |
| Sound | Claude Castonguay | Original Music Composer |
| Directing | Milena Popović | Script Supervisor |
| Production | Linda Berger | Casting |
| Sound | Marc Ouellette | Original Music Composer |
| Production | Vera Miller | Casting |
| Camera | Bertrand Calmeau | Still Photographer |
| Costume & Make-Up | Melissa Purino | Key Makeup Artist |
| Camera | Daniel Villeneuve | Director of Photography |
| Sound | Diandra Yoselevitz | Music Supervisor |
| Art | Julie Robert | Property Master |
| Production | Nadia Rona | Casting |
| Costume & Make-Up | Annie-Genevieve Larocque | Hairstylist |
| Costume & Make-Up | Marcelo Padovani | Hairstylist |
| Directing | Robbie Ditchburn | First Assistant Director |
| Costume & Make-Up | Ronald J. Rolfe | Hair Department Head |
