The Hellsing Organization, a secret branch of the British government, has long been battling supernatural threats to keep the people safe from creatures of the night. Its current leader, Sir Integra Hellsing, controls her own personal army to eliminate the undead beings, but even her highly trained soldiers pale in comparison to her most trusted vampire exterminator, Alucard, who is actually a powerful vampire himself. Along with Integra's mysterious butler and Alucard's new vampire minion, Seras Victoria, the Hellsing Organization must face not only regular ghouls and vampires, but a rivaling secret branch of the Vatican and an mysterious group of madmen spawned by a certain war over 50 years ago.

The original Hellsing manga by Kouta Hirano ran 10 volumes, finishing in 2008. The Hellsing anime followed a different storyline, but with the same main characters. The dub ran in the United States from October 4, 2003 to December 27, 2003 on Starz!'s Encore Action cable channel.
The Hellsing OVA started at 2006, once completed will features 10 Episodes and, unlike the anime, it follows the manga more closely.