The line of poetry that Victor Frankenstein quotes, and from which the episode's title is derived, is from "Adonais," written by Percy Bysshe Shelley. His wife, Mary Shelley, was the author of "Frankenstein."
The two tarot cards Vanessa draws at the beginning of the episode are the Five of Cups and The Moon. The Five of Cups symbolizes loss, grief, and regret. The Moon symbolizes the unconscious, illusions, fear, and repressed feelings.
The music playing when Mr. Gray is showing his artwork and seducing Vanessa is Lakme: The Flower Duet by Leo Delibes.
This music also figures prominently (though uncredited) in another vampire movie. The Hunger (1983).
Richard Riddell (Nathaniel Morris) has worked with two actors born in the city of Exeter in Devon (south-west England): Harry Treadaway in this episode and Bradley James in 'Merlin'. They played Evan and Arthur respectively.