Revealing mistake: When Natalie shows Nick the murdered museum guard's bite wounds in the morgue, the "dead" man's carotid artery is pulsing quite healthily. (00:08:30)
Dance By The Light Of The Moon - S1-E7
Revealing mistake: The flashbacks to 1228 in this episode portray some of the same events - Janette seducing Nick, LaCroix making Nick a vampire - that are also shown in "Dark Knight." But here, Nick, Janette and LaCroix are all wearing completely different costumes.
Revealing mistake: The re-use of a brief scene from the pilot episode, inserted during Nick and LaCroix's vampire battle in the warehouse, creates the unfortunate problem of Nick completely changing clothes in the middle of the fight. (00:37:35)
Revealing mistake: It wasn't supposed to be in shot, but the camera accidentally caught the stuffed caterpillar toy perched on Nat's desk in the coroner's lab. It was there because nursing mom Catherine Disher had her new baby nearby on set. Fans wondered, though, why the single, childless Nat would keep baby toys in the morgue. (00:17:20)
Partners of the Month - S2-E18
Revealing mistake: When Schanke, in a huff, packs up his treasures and moves out of Nick's loft, he kicks the box of his belongings into the freight elevator, then gets in and closes the door. If you watch closely, you can see the cord of his duck lamp caught under the door, where it stays even after the elevator supposedly begins its descent. (00:31:55 - 00:34:55)
A More Permanent Hell - S2-E20
Revealing mistake: Mt. Vesuvius is erupting and LaCroix's villa is collapsing around him. But while the ground "shakes," statuary falls over and the walls cave in, look closely at the fountain/pool in the center of the room. There's not a drop splashing out of it. In fact, the water's surface is smooth as glass.
Curiouser & Curiouser - S2-E22
Revealing mistake: After Nick demands to be told what's going on, LaCroix leaves - but his reflection remains in the mirror for a few seconds after we hear the sound effect of his flying away. (00:28:45)
Revealing mistake: At the episode's end, the sharp, moving background of nighttime Toronto from the top of the CN Tower suddenly shifts to a still, blurry (and glaringly obvious) matte image. The scene was partly shot atop the actual tower, but because high winds and sway made the location too dangerous, it was abandoned, and the bulk of the scene had to be shot in studio and processed. (00:37:15)
Revealing mistake: When Nat enters Nick's loft from the lift, the bright lighting reveals that there is no break in the solid floor to allow the movement of a real elevator. (00:36:45)
Revealing mistake: When Robert is shot, the car blowing up in the alley is sort of half an explosion, abruptly curtailed. Severely cold weather during shooting literally froze the cameras and left only a few seconds of usable footage. That snippet is repeated for effect, but the explosion still looks "cut off" because it is. (00:32:00)
Revealing mistake: When LaCroix opens the box containing Divia's little "surprise," the severed head's eyes move slightly as the covering tissue paper is removed. (00:07:20)
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.