Hellboy: Conqueror Worm #4 was published by Dark Horse Comics on August 1, 2001, as part of a series that began in 2001. Mike Mignola writes, and art comes from Dave Stewart and David Stewart. This 36-page issue features Hellboy, Grigori Rasputin, Baba Yaga, Dr. Kate Corrigan and Hecate, among 13 characters cataloged on VerseDB.