Did vampires ever really exist? The myth is likely related to a medical condition with symptoms that may explain many elements of centuries-old vampire folklore.
And every one of them has a happy ending.
The latest version of the Gothic vampire chiller is brought to you with the trademark humour of writers Steven Moffat and Mark Gatiss.
One of the reasons the myth of vampires endures and captures the popular imagination is that vampires are a powerful metaphor for a wide range of cultural practices and social problems.
New research is uncovering medieval legends about the undead in Britain.