Inquisitive journalist Grace Collier is horrified when she witnesses her neighbor, fashion model Danielle Breton, violently murder a man. Panicking, she calls the police. But when the detective arrives at the scene and finds nothing amiss, Grace is forced to take matters into her own hands. Her first move is to recruit private investigator Joseph Larch, who helps her to uncover a secret about Danielle's past that has them both seeing double.
You can now watch Sisters online on the following streaming providers in the United States.
| Writing | Louisa Rose | Screenplay |
| Camera | Gregory Sandor | Director of Photography |
| Editing | Paul Hirsch | Editor |
| Directing | Brian De Palma | Director |
| Writing | Brian De Palma | Screenplay |
| Production | Edward R. Pressman | Producer |
| Sound | Bernard Herrmann | Original Music Composer |
| Production | Sylvia Fay | Casting |
| Production | Robert Rohdie | Associate Producer |
| Writing | Brian De Palma | Original Story |
| Production | Lynn Pressman-Raymond | Associate Producer |
| Art | Gary Weist | Production Design |
| Costume & Make-Up | Jeanne Richmond | Key Makeup Artist |
| Directing | Alan Hopkins | Assistant Director |
| Sound | Russell Arthur | Sound Recordist |
| Sound | John Fox | Sound Editor |
| Sound | Dick Vorisek | Sound Mixer |
| Editing | Susan Braddon | Assistant Editor |
