Continuity: Nick and Tracy find a crying but uninjured baby, the only mortal survivor of the plane crash, in the wreckage. Yet in part 2, Nick tells Urs that Vachon was the only survivor.

Factual error: In the flashbacks, the shipboard lifesaver rings are emblazoned with the incorrect designation "S.S. Titanic." The Titanic was a Royal Mail Ship. The stencil should have read R.M.S., not S.S.

Factual error: When the Inca is threatening Tracy in Spanish, the translation subtitles read, "He thinks he has invaded me." They were supposed to say, "_evaded_ me." (Note: This has been corrected in the dvd set released 10/06.)

Revealing: 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.

Continuity: When he's rescuing Tracy at the end, Vachon bites Vudu. But when Nick arrives and props up the dying man, there are no marks and no blood on his neck.

Plot hole: In a major violation of series canon, this episode ends with the vampire doggie (a silly enough premise to begin with) bringing its owner across, a process previously established as complex enough to be far beyond even the smartest canine's capabilities.

Deliberate "mistake": Because the scene had to be lit for the viewers, the blind dispatcher Jody, even when she's alone, keeps several lamps and other lights turned on in her apartment.

Plot hole: When LaCroix arrives at the amnesiac Nick's loft, Nick recognizes him as "the doctor from the hospital." But Nick was still comatose when LaCroix posed as a doctor and came to his room, so he shouldn't remember that particular "doctor."

Continuity: The blood stain on Tracy's lapel changes its shape several times between takes.

Visible crew/equipment: When Natalie is telling the amnesia-stricken Nick that he's a vampire, an equipment shadow moves across the stove in the lower right hand corner of the screen.

Visible crew/equipment: While Natalie is stocking Nick's kitchen with groceries, a shiny pot on the shelf over the stove captures a reflection of several crew members standing on the other side of the set.

Continuity: The actor playing the bad guy apparently didn't stick to the script. What he says on the phone, telling Tracy where to meet him, and what she writes down for Nick to find later, don't match at all.

Plot hole: Because he has no discernible vital signs, the wounded Nick is declared dead in the hospital. When he revives, he's rushed into surgery, where he'd surely have been reattached to a monitor. Somehow, though, no one on the medical staff notices that their patient still has no normal pulse or heartbeat.

Plot hole: Bullets, which have been passing harmlessly through Nick for two whole seasons, suddenly do him great injury here. And though he's taken to surgery, the bullet lodged in his head is never removed. It's still there on the latest x-ray when LaCroix arrives to "consult" with the doctor.

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.

Continuity: The clock on Natalie's lab wall jumps forward almost half an hour during a 2-minute conversation with Nick.

Deliberate "mistake": At the end, a line apparently cut earlier creates slight confusion. Nick says to Nat, "When LaCroix asked you why?" (why save vampires). In the earlier scene as shown, the elusive LaCroix spoke only briefly to Nat in the lab, and never asked her that question.

Continuity: When Cal falls against the canister in the lab and accidentally releases the poison gas, the position of the big yellow lever on the gas pipe shifts back and forth by 90 degrees between takes.

Plot hole: Nick has spent two seasons with the supernatural ability to see perfectly well in the dark. But here, exploring the haunted house alone, he suddenly needs a big neon-blue-beamed flashlight to see where he's going.

Plot hole: The handyman tells the police that he has turned on the power to restore lights in the house. Why, then, is everyone still crawling through the place with flashlights?