Factual error: LaCroix visits the comatose Nick in the hospital and detaches a pulse monitor that A) shouldn't be beeping, seeing as it's attached to a vampire, and B) should have immediately sounded an alarm when it was removed. (00:08:30)
Factual error: The costumes in the flashback to Nick's wedding are a mishmash of the mismatched, coming from several different eras, including a full metal suit of armor that's at least 2 centuries ahead of the flashback's period setting in the 1200s. (00:14:00)
Factual error: In the flashback to Nick's wedding night, his medieval tunic/shirt has 20th Century white plastic 4-hole buttons sewn to the cuffs. (00:29:25)
The Games Vampires Play - S3-E15
Factual error: At the end, Nick recites the "you have the right to remain silent" spiel to Rita as he arrests her. Suspects in Canada, where this show is set, are not "read their rights." That's a U.S. law (the Miranda Act) and it isn't observed north of the border. (00:41:45)
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.