Ultraviolet is a 1998 British television series written and directed by Joe Ahearne and starring Jack Davenport, Susannah Harker, Idris Elba, and Philip Quast.

Investigating Jack's disappearance leads Michael into the path of a secret paramilitary vampire-hunting organization supported by the British government and the Vatican.

Pearse Harman (Philip Quast) is diagnosed with terminal cancer, but fears that leaving his post may doom the world to whatever fate the vampires have in store for it.

Instead, they plan to cause a nuclear winter, providing long-lasting darkness, and completely wiping out the threat of humanity with an engineered plague.

Scientific advances made during their experiments will allow them to survive on synthetic blood and reproduce via live birth, eliminating the need for human victims.

A cancer specialist and the team's resident doctor and lead scientist, Angie Marsh became involved in the organisation when her husband Robert, a prominent medical researcher, and her daughter were turned into vampires and killed by Pearse.

The leader of the organisation and a priest, Pearse has a droll and cynical personality but also provides occasional black humour to lighten the gravity of the situation.

Despite his illness he continues to work, desperate to learn the secrets of vampire regeneration which are finally revealed in the last episode of the series.

In the finale, Pearce is forced to demonstrate the existence of vampires to her to persuade her to cooperate with Section V. A journalist whom Kirsty enlists to help find Michael after the latter disappears.

The clandestine vampire-hunting squad uses overwhelming numbers and modern "state-of-the-art" versions of traditional anti-vampire weapons: carbon bullets instead of wooden stakes; gas grenades with concentrated allicin, a compound derived from garlic; and video cameras as sights on firearms since vampires are as invisible to electronic devices as mirrors.

Angie March comments at one point that she's "getting a reputation as an anti-social parent" because she won't let her daughter attend social functions after dark.

In 2000, the American Fox network developed a version of Ultraviolet, starring Eric Thal, Joanna Going and Mädchen Amick with Idris Elba reprising his role from the British series.