Hellboy: In Service of the Demon
- Joer: 2008
- Land: Hungary, United States of America
- Genre: Documentary
- Studio: Universal Studios Home Entertainment
- Schlësselwuert: movie business, making of
- Direkter: Javier Soto
- Besetzung: Guillermo del Toro, Mike Mignola, Ron Perlman, Lloyd Levin, Lawrence Gordon, Doug Jones