Question: Two questions. 1. Was there some kind of contributing factor that made Nick want to be human again and if so what was it? 2. In one episode Janette is discovered to be human again. How did she accomplish this?
Factual error: Nick tells fellow vampire Aristotle, "You still owe me for that time at the Battle of Hastings." Nick was brought across in 1228, or so the intro told us every week. The Battle of Hastings, as any British school kid knows, was fought in 1066, over 100 years before Nick's mortal birth. (00:29:30)
Tracy: Now that I've expressly told you I don't need your help... I need your help.
Trivia: The piano piece Nick plays in this episode was composed and performed by Geraint Wyn Davies. He wrote it for his children, as an elegy to a pet bird that had died. (00:09:40)
Answer: Nick was sick and tired of being an immortal bloodsucker. He wanted to be human, fall in love, get married, have children, grow old and die. As for Janette, according to her, she fell in love and the passion she felt "cured" her of her blood lust.