immortality

Mr Wonderful Takes a Cruise and its sequel Mr Wonderful Seeks Immortality detail his trips to, among other places, Bromley, Balham and the nightclub Spearmint Rhino.

In the series’ final moments, Agatha appears to Billy as a wise-cracking ghost, sporting a silvery hairdo in her afterlife and pondering if this new shade of immortality looks good on her.

He explains stories about the vampires "come back over and over again" because they "get in your bones and haunt you," with many raising questions of immortality, death and love.

The combination of love and immortality, Dr George says, is also seen in Francis Ford Coppola's 1992 film Bram Stoker's Dracula, which ran with the tagline "love never dies".

While the characteristics of fictional vampires have changed throughout history - some burn to a crisp in the sunlight, others have famously sparkly skin - they have one thing in common: immortality.