Despite Jigsaw's death, and in order to save the lives of two of his colleagues, Lieutenant Rigg is forced to take part in a new game, which promises to test him to the limit.
You can now watch Saw IV online on the following streaming providers in the United States.
| Directing | Darren Lynn Bousman | Director |
| Writing | Patrick Melton | Screenplay |
| Writing | Marcus Dunstan | Screenplay |
| Production | Oren Koules | Producer |
| Production | Mark Burg | Producer |
| Production | Daniel J. Heffner | Executive Producer |
| Production | James Wan | Executive Producer |
| Production | Stacey Testro | Executive Producer |
| Production | Peter Block | Executive Producer |
| Production | Jason Constantine | Executive Producer |
| Camera | David A. Armstrong | Director of Photography |
| Editing | Brett Sullivan | Editor |
| Sound | Charlie Clouser | Original Music Composer |
| Costume & Make-Up | Alex Kavanagh | Costume Design |
| Production | Gregg Hoffman | Producer |
| Editing | Kevin Greutert | Editor |
| Production | Leigh Whannell | Executive Producer |
| Production | Stephanie Gorin | Casting |
| Art | David Hackl | Production Design |
| Art | Anthony Ianni | Art Direction |
| Art | Liesl Deslauriers | Set Decoration |
| Writing | Patrick Melton | Story |
| Writing | Marcus Dunstan | Story |
| Writing | Thomas Fenton | Story |
| Costume & Make-Up | Stephanie Ingram | Key Hair Stylist |
| Costume & Make-Up | Candice Ornstein | Key Makeup Artist |
| Costume & Make-Up | François Dagenais | Prosthetic Makeup Artist |
| Directing | Elizabeth Scherberger | First Assistant Director |
| Art | Jamie Burke | Construction Coordinator |
| Art | James R. Murray | Property Master |
| Sound | John Laing | ADR Editor |
| Sound | Jason Hopfner | Boom Operator |
| Sound | Allan Fung | Dialogue Editor |
| Sound | Steve Baine | Foley |
| Sound | Tom Bjelic | Sound Effects Editor |
| Sound | Keith Elliott | Sound Re-Recording Mixer |
| Sound | Andrew Tay | Sound Re-Recording Mixer |
| Sound | Mark Zsifkovits | Sound Re-Recording Mixer |
| Sound | Mark Gingras | Supervising Sound Editor |
| Sound | John Douglas Smith | Supervising Sound Editor |
| Crew | Warren Appleby | Special Effects Coordinator |
| Visual Effects | Peter Denomme | Visual Effects Producer |
| Visual Effects | Jon Campfens | Visual Effects Supervisor |
| Visual Effects | Voytek Kufner | Animation |
| Lighting | Christopher Takacs | Best Boy Electrician |
| Camera | Brian Gedge | Camera Operator |
| Camera | James Jeffery | Camera Operator |
| Camera | Thomas Care | Dolly Grip |
| Lighting | Richard Berube | Electrician |
| Lighting | Sean Dawes | Electrician |
| Lighting | Stephen Myers | Electrician |
| Lighting | Philip Charles Whitfield | Electrician |
| Lighting | Ira Cohen | Gaffer |
| Camera | Kevin LeBlanc | First Assistant Camera |
| Camera | Ernest Spiteri | First Assistant Camera |
| Camera | Monty Montgomerie | Key Grip |
| Lighting | Robert DaPrato | Rigging Grip |
| Lighting | Tracy Shaw | Rigging Grip |
| Lighting | Pete Daprato | Rigging Grip |
| Camera | Steve Wilkie | Still Photographer |
| Costume & Make-Up | Stephanie Lees | Assistant Costume Designer |
| Costume & Make-Up | Ciara Brennan | Costume Coordinator |
| Directing | Elizabeth Tremblay | Script Supervisor |
| Sound | Paul Intson | Music Editor |
| Sound | Jonathan McHugh | Music Supervisor |
| Sound | Jonathan Scott Miller | Music Supervisor |
| Sound | Jonathan Platt | Music Supervisor |
| Editing | Tavia Charlton | Digital Intermediate |
| Editing | Nick Iannelli | Digital Intermediate |
| Editing | Trevor Lewis | Digital Intermediate |
| Editing | Chris MacKenzie | Digital Intermediate |
| Editing | Dave Muscat | Digital Intermediate |
| Editing | Nick Paulozza | Digital Intermediate |
| Editing | Tom Mayclim | Negative Cutter |
| Production | Greg Copeland | Co-Producer |
| Production | Greg Copeland | Production Manager |
| Production | Troy Begnaud | Associate Producer |
| Crew | Alison Reid | Stunt Coordinator |
| Production | Jane Rogers | Extras Casting |
| Crew | Shawn Stewart | Stunt Double |
| Crew | Billy Oliver | Stunt Double |
| Crew | Neil Davison | Stunt Double |
| Crew | Marco Bianco | Stunt Double |
| Writing | Leigh Whannell | Original Film Writer |
| Writing | James Wan | Original Film Writer |
