an anime series of the same name was produced by gonzo. the series was directed by umanosuke iida. it was based on the manga but used a screenplay by chiaki j. konaka. it was different from the manga in terms of plot, though it used some of the same characters and similar character designs. it has thirteen episodes. it was broadcast on japan's fuji television from october 10, 2001 to january 16, 2002. an original video animation (ova) called "hellsing ultimate" was produced by geneon. it followed the manga storyline more closely than the anime series. the series was 10 episodes long. it was released in japan between february 10, 2006 and december 26, 2012. in north america, the series ran from december 5, 2006 to october 28, 2014.