Clockwise from top: Seras Victoria, Integra Hellsing and Alucard.
In the name of God, impure souls of the living dead shall be banished into eternal damnation. Amen.
Led by Integra Hellsing, the secret Hellsing Organization's mission is to protect Britain, its Queen, and the Anglican Church from supernatural threats, mainly vampires. As the series begins, one such vampire is ravaging the English village of Cheddar, turning its inhabitants into “ghouls”. To deal with this threat, Integra sends Hellsing’s most powerful operative, Alucard.Alucard confronts the vampire as he is about to murder the last survivor of the police forces, Seras Victoria. In order to kill the vampire he shoots through Seras, mortally wounding her. He offers her the chance to become a vampire herself, and she accepts. Alongside Integra, Alucard, and Hellsing’s human operatives, Seras discovers and fights a new kind of mass-produced undead, called FREAKs .The TV series is told mainly from Seras’ perspective as she adjusts to life as a vampire in the employ of Hellsing, while attempting with the other characters to unravel the mystery of the artificial vampires and the FREAK chips. The first half of the series is more or less faithful to the original manga; however, themes such as what it means to be “human” and character development are explored more in-depth. The latter half of the TV series is where it diverges wildly from its source material, due to it overtaking the manga.For the original manga and OVA, see Hellsing. The TV series has its own characters page.
Ate His Gun: In a flashback, Alexander is shown attempting this during his first encounter with Alucard. Obviously, either it didn't work or he stopped himself.
The Bad Guy Wins: By the end of the series, the surviving heroes are imprisoned as traitors, the conspirators have won and Hellsing's been disbanded. But the final scene reveals that Alucard is still loose and loyal to Integra, leaving open the possibility of Hellsing taking on the British government.
Demoted to Extra: Anderson, and the Wild Geese from the original manga. A mercenary group very similar to the Wild Geese shows up in the later episodes, but they don't get nearly the screentime or importance the Wild Geese did in the manga.
Disposable Woman: Played with in the first episode. A fat, lecherous executive is groping a prostitute. Alucard shows up and calls out the vampire. It's the woman.
Distressed Damsel: Integra spends much more time in life-threatening danger than her manga and OVA counterparts.
Invincible Hero: To a degree, Alucard is this. He's not completely invincible but being beheaded was only an inconvenience.
The Abridged series gives an excellent nod to this trope when Alucard and Integra talk on the phone. "Oh what are you going to do, call that guy that can stop me? What was his name? Michael McDoesn'tExist?"
Incognito takes it further: African Black Magic Nosferatu.
No Swastikas: Avoids the issue entirely by excluding the later Millennium arc, but this is due to production timing rather than censorship (but the shape of the circuitry in the FREAK chips in the series is pretty suggestive).
Shout-Out: Possibly to the Wilmarth Foundation in the Cthulhu Mythos, which may have influenced the portrayal of the Hellsing Organization. The show's writer is known for being a fan of the Mythos, and often adds Lovecraftian themes or references to his works.
Take That, too - The dub of Episode Four of the anime references The Sun, a British tabloid, when a newscaster is being chewed out over a broadcast of Hellsing operatives.
When Alucard confronts Anderson in episode 7 he calls him Judas Priest.