Dead Zone
Picking up where Brotherhood left off. Luke and Jan, the Valentine Brothers, lay siege to the headquarters of the Hellsing organization, the Royal Order of Religious Knights. After numerous humans have been killed and eaten by an army of ghouls, Victoria, Walter, and Alucard finally get around to striking back. Victoria and Walter eliminate hundreds of ghouls with a combination of deadly threads and heavy artillery. The lead flies when Alucard and Luke face off, but Luke is devoured by a canine monster Alucard summons up. Jan sets himself afire rather than reveal the mastermind of their plot to Sir Integra Hellsing.
Aired 15/11/2001EP 6 - Dead Zone

Hellsing
Hellsing follows the antiheroic vampire, Alucard, and a police girl-turned-vampire, Seras Victoria, two vampires employed by the vampire-extermination group of England, the Hellsing Organization. Slowly but surely, through their active duty, they find a new breed of vampires beginning to arise.
(Source: Anime News Network)