| Person | Type | Job | Role(s) |
|---|---|---|---|
 Billy McMillin | Crew | Writing | Writer, Editor |
Damien Echols | Crew | Production | Producer |
Dan Kaplow | Crew | Production | Line Producer |
 Fran Walsh | Crew | Production | Producer |
Jonathan McHugh | Crew | Sound | Music Supervisor |
 Maryse Alberti | Crew | Camera | Director of Photography |
 Nick Cave | Crew | Sound | Original Music Composer |
 Peter Jackson | Crew | Production | Producer |
 Warren Ellis | Crew | Sound | Original Music Composer |
 Amy J. Berg | Crew | Directing | Director, Producer, Writer |
Ken Kamins | Crew | Production | Executive Producer |
Ronan Killeen | Crew | Camera | Director of Photography |
Lorri Davis | Crew | Production | Producer |
Katelyn Howes | Crew | Production | Associate Producer |
Matt Dravitzki | Crew | Production | Co-Producer |
Tina Elmo | Crew | Production | Line Producer |
Damien Echols | Cast | Actor | Self |
 Eddie Vedder | Cast | Actor | Self – WM3 Supporter |
 Erin Moriarty | Cast | Actress | Self – Journalist |
 Henry Rollins | Cast | Actor | Self – WM3 Supporter |
 Jason Baldwin | Cast | Actor | Self |
Jessie Misskelley Jr. | Cast | Actor | Self |
Jessie Misskelley Sr. | Cast | Actor | Self – Jessie's Father |
John Mark Byers | Cast | Actor | Self – Adoptive Father of Christopher Byers |
 Johnny Depp | Cast | Actor | Self – WM3 Supporter |
 Natalie Maines | Cast | Actress | Self – WM3 Supporter |
Pam Hobbs | Cast | Self – Stevie Branch's Mother | |
 Patti Smith | Cast | Actress | Self – WM3 Supporter |
Peter Jackson | Cast | Actor | Self – WM3 Supporter |
Terry Hobbs | Cast | Self – Stevie Branch's Stepfather (archive footage) | |
Mara Leveritt | Cast | Self – Author - "Devil's Knot" | |
Don Horgan | Cast | Self – Damien Echols' Attorney | |
Gary Gitchell | Cast | Self – West Memphis Police Department (archive footage) | |
Lorri Davis | Cast | Actress | Self – Damien's Wife |
 John Douglas | Cast | Actor | Self – FBI Profiler, Retired |
Barry Scheck | Cast | Self – The Innocence Project | |
Dennis Riordan | Cast | Self – Damien Echols' Attorney | |
Richard Souviron | Cast | Self – Forensic Odontologist (archive footage) | |
| Person | Type | Job | Role(s) |
