- Directors: Guillermo del Toro
- Producers: Lawrence Gordon, Lloyd Levin, Mike Richardson
- Writers: Screenplay, Guillermo del Toro, Story, Guillermo del Toro, Peter Briggs, Comic Book, Mike Mignola
- Genres: Action, Adventure, Fantasy
- Actors: Ron Perlman, Rupert Evans, Doug Jones, Selma Blair, Ladislav Beran, John Hurt, Jeffrey Tambor
In 1944, the Nazis work with the undead Russian mystic Grigori Rasputin on an isolated island off the coast of Scotland to build a dimensional portal. They intend to use it, with Rasputin’s help, to awaken the Ogdru Jahad, monstrous entities that have been imprisoned and asleep since an undisclosed time, to destroy their enemies. But Rasputin secretly intends to use the entities to bring about the destruction of the entire Earth. He is aided by his servant, Ilsa von Haupstein, to whom he has granted eternal life, and Nazi Lieutenant Colonel Karl Ruprecht Kroenen, Hitler’s top assassin and head of the Thule Occult Society. The United States sends a small Army team to destroy the portal, guided by a young doctor, Professor Trevor Broom (professor Bruttenholm in the comics), who is well-versed in the occult. In the ensuing battle, the German scientists and soldiers are killed and the portal is destroyed, in the process absorbing and apparently killing Rasputin. Ilsa and Kroenen escape capture. As the Army team surveys the ruins for anything that may have sneaked into their dimension through the portal, they discover an infant demon with a stone right hand. Broom coaxes it into his arms with a Baby Ruth candy bar. The soldiers affectionately name the little creature “Hellboy.”
Finally, the film ends with a humorous mid-credits scene, where a forgotten and frightened Manning is lost several levels down in the dank and dim halls of the mausoleum, listening to maybe the rustle of footsteps, and looking to see if there’s anyone around.