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: 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)
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)
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.
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: 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)