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.
You can now watch The Good Sister online on the following streaming providers in the United States.
| Directing | Philippe Gagnon | Director |
| Writing | Pablo F. Fenjves | Writer |
| Production | Ian Whitehead | Producer |
| Sound | Claude Castonguay | Original Music Composer |
| Sound | Marc Ouellette | Original Music Composer |
| Camera | Daniel Villeneuve | Director of Photography |
| Editing | Chantal Lussier | Editor |
| Production | Linda Berger | Casting |
| Production | Vera Miller | Casting |
| Production | Nadia Rona | Casting |
| Costume & Make-Up | Annie-Genevieve Larocque | Hairstylist |
| Costume & Make-Up | Marcelo Padovani | Hairstylist |
| Costume & Make-Up | Melissa Purino | Key Makeup Artist |
| Costume & Make-Up | Ronald J. Rolfe | Hair Department Head |
| Directing | Robbie Ditchburn | First Assistant Director |
| Art | Julie Robert | Property Master |
| Camera | Bertrand Calmeau | Still Photographer |
| Sound | Diandra Yoselevitz | Music Supervisor |
| Directing | Milena Popović | Script Supervisor |
| Production | Jean Bureau | Executive Producer |
| Production | Kaleigh Kavanagh | Associate Producer |
| Costume & Make-Up | Anie Fisette | Costume Design |