In the six-part British "vampire-slaying" mini-series Ultraviolet we discover that UV light is used (both in surgery and via high-tech weaponry) to identify people who have been infected with a disease labelled "Code 5". It's transmitted via a bite to the neck, but at no point in the series is the word "vampire" used. Instead, in the second episode ("In Nomine Patris") the nickname "Leech" is introduced. We learn that it was this disease, these "Leeches", that were responsible for the Fire of London, and that one in 20 people are already infected. In the opening episode, policeman Michael Colefield (Jack Davenport) is recruited into the secretive CIB. He meets its introverted priest-chief Pearse (Philip Quast), the emotionally driven Dr Angela March (Susannah Harker) and the bullish heavyweight Vaughan (Idris Elba).
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