Gray Matter
- Leto: 2004
- Država: United States of America, Canada
- Žanr: Dokumentarni
- Studio: CBC, Cinemax Reel Life, France 2, Multimedia France Production, Third Eye Motion Picture Company, HBO, HBO Documentary Films, RadicalMedia
- Ključna beseda:
- Direktor: Joe Berlinger
- Igralska zasedba: Joe Berlinger