Mourning the loss of her father, who committed suicide, Mackenzie starts having hallucinations of killing people. They seem so real that she's convinced she's been committing these crimes; however, she can find no evidence to support this. Is she losing her marbles, or is there something sinister at work around her?
You can now watch I Know What I Saw online on the following streaming providers in the United States.
| Writing | Michael C. Elliot | Writer |
| Production | Monica Parker | Executive Producer |
| Production | Kirk Shaw | Executive Producer |
| Production | Stanton W. Kamens | Executive Producer |
| Writing | Kimberley Wells | Writer |
| Editing | Gordon Williams | Editor |
| Directing | George Mendeluk | Director |
| Production | Joseph Lawlor | Executive Producer |
| Art | Renée Read | Production Design |
| Camera | C. Kim Miles | Director of Photography |
| Art | Moni El Batrik | Set Decoration |
| Art | Tullis Rose | Set Decoration |
| Production | Lindsay MacAdam | Co-Producer |
| Production | Donald Paul Pemrick | Casting |
| Sound | Clinton Shorter | Original Music Composer |
| Production | Dean E. Fronk | Casting |
| Costume & Make-Up | Rebekka Sorensen | Costume Design |
| Production | Candice Elzinga | Casting |
| Crew | Owen Walstrom | Stunt Coordinator |
| Crew | Laura Lee Connery | Stunt Double |
| Lighting | Calen Zantolas | Gaffer |