Factual error: Nat's god-daughter Cynthia Luce is buried within a few days of her murder with an elaborate headstone already in place. (In reality, headstones take months to produce.) But the wrong name is carved on the stone. It reads "In memory of Cynthia Lambert." (00:43:30)
Factual error: At the very end, Bridget Hellman is buried with a fully-engraved headstone in one just one day's time (which happens only in tv & movies: the process takes months in real life... er, death). She also spontaneously returns as a vampire without being "brought across," a violation of series canon, and she comes back mysteriously sporting 3 times more hair than she had as a mortal. (00:43:10)
Can't Run, Can't Hide - S2-E10
Plot hole: In the underground bunker, Nick demands to know why the vampires in Vietnam are feeding on the children "when there are so many dead up there". Yet later in this same episode (as well as at other times in the series), it's stated that "Forever Knight's" vampires can't drink from the dead. (00:20:35 - 00:27:40)
Continuity mistake: It's 9:10 a.m. outside the police precinct station, and after a 4-minute interview scene with no time lapses, it's 2:55 p.m. inside. (00:21:50 - 00:25:10)
Plot hole: At the end, Nick and Schanke discuss the bruise Nick's blow supposedly left on Damir's jaw. But Nick didn't hit Damir. He grabbed and tossed him bodily into a trash heap in the alley - without ever once touching his jaw. (00:41:50)
Continuity mistake: Although they never reverse their direction, when Nick and Schanke are walking down the Toronto city street, they pass the same bright yellow discount store sign twice.
Continuity mistake: In the flashback to 1228, Nick's just-awakened sister Fleur has her hair down over her ears, and is wearing a white night dress that covers her to the neck. Cut to a close-up and her hair is pulled back to reveal pierced earrings (unlikely in 1228, and did she sleep with them on?), and she's suddenly in a bare-shouldered gown instead of her night dress. (00:08:35)
Blood Money - S2-E17
Continuity mistake: When Nick and Schanke begin interrogating Sean, the tape recorder on the desk isn't running. It's going a few shots later, though, even though no one's touched it to turn it on. (00:30:30)
Blood Money - S2-E17
Continuity mistake: When Sean sneaks back into the night club owner's office, we can see as he enters that there is no one in the left-hand side of the room. Yet, as Sean sits down at the desk, Walken somehow emerges from the left corner, which we have just seen was empty a moment before. (00:39:15)
Partners of the Month - S2-E18
Continuity mistake: Schanke's mother-in-law had previously been established as dead, yet Schanke's talking to her on the phone in this episode. (00:16:25)
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)
Partners of the Month - S2-E18
Continuity mistake: While he's talking to Janette at the Raven, the level of fluid in Schanke's cocktail changes all by itself from several inches down to nearly full again, even though he's been sipping at it throughout their conversation. (00:34:55)
Continuity mistake: Nick and Schanke are interrogating a murder suspect and disagreeing about whether or not she did the deed. They leave the interview room together, and Nick's hair completely changes styles as he walks out of the room. On the inside of the door, it's combed down over his forehead and rather "fluffy." The minute he exits on the other side of the door, it's brushed back and slicked down. (00:25:55)
A More Permanent Hell - S2-E20
Factual error: In the first scene, Dr. Dana says the asteroid heading for Earth is 5 miles wide, "larger than the one that caused the dinosaur extinction." The asteroid that did in the dinos is estimated by most scientists to have been 6-8 miles wide. (00:03:00)
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.
Continuity mistake: In the flashback, the level of whiskey in the bottle changes from 1/3 empty to nearly full and back again as the shots alternate. (00:16:25)
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)
Near Death - S2-E23
Continuity mistake: While Nick is interviewing Dr. Linsman, the position of his hands shifts (from lying flat on the desk to held up near his face) every time the camera angle changes. (00:08:15)
Near Death - S2-E23
Continuity mistake: The flashbacks here recount Nick's "bringing across." But for the second time in the series, the recap of this event contradicts the original pilot film version in that the characters have all changed costumes. (00:25:10)
Near Death - S2-E23
Plot hole: Dr. Linsman puts a heart monitor on Nick for the experiment, but for some bizarre reason, never questions why her "patient" has a resting heart rate of only one beat every ten minutes.
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.