Continuity mistake: When Andre Toulon puts Blade into the suitcase, near the start of the film, Blade's hook is on his right hand but it is attached to his left hand in all other shots of him. (00:09:45)
Continuity mistake: Toward the end when Alex is being punched by the "Puppet Master" his mouth is all bloody. Then Megan smashes a vase on The Puppet Master's head, and in the next shot Alex's face is no longer bloody. In the next closeup of him the blood has returned. (01:13:05)
Revealing mistake: When Dana is walking down one hall with Leroy and a bottle of champagne, the exit sign is reversed. (00:53:05)
Other mistake: When Dana enters the hall after being attacked by Pin Head, the door opens out into the hall, but it should open into the room, not out into the hallway. (00:57:00)
Plot hole: We discover that Teresa the maid has been turned into some kind of living zombie at the end of the movie. She confronts Alex and Megan near the end, and they run away from her and then fight with the Puppet Master. The issue of Teresa is then never addressed in the rest of the film, she just simply disappears from the plot and the scene. (01:13:35)
Continuity mistake: When Andre puts Blade in the suitcase, Blade's knife is missing and there's nothing where his left hand should be.
Continuity mistake: When Frank and Carissa are having sex and Carissa notices the door is open, her hair moves from hanging over her shoulder to behind her shoulder. (00:49:15)
Revealing mistake: When Alex and Megan find the dead bodies in the dining hall, in the closeup shot of Dana, her neck pulsates. (01:09:05)
Revealing mistake: Toward the end of the movie, when Gallagher is trying to escape the elevator through the top, the wires for the Tunneler Puppet are visible in one shot. (01:16:10)
Continuity mistake: When Tunneler drills the back of Neal's leg, you can see blood in the wound, but when Neal pulls him out, he has green ooze on his drill instead of blood.
Revealing mistake: Dana enters her room and sees Neal sitting in the chair. Right at the part where she tells him that he can fool the others but not fool her, there's some smoke in the close up shot of Neal's face.
Continuity mistake: When Blade gets on the elevator in the beginning, pay attention to the legs of the woman in the elevator. When she gets on, she is wearing black stockings. When she gets off, she is wearing cream-colored stockings. The rest of her clothes that are visible are the same (same shoes, skirt, etc.), as is the wardrobe of the man who gets on and off with her, so it's meant to be the same woman. (There's also no indication that the elevator made any stops on the way up).
Visible crew/equipment: When Frank, Carissa and Dana are "paying their respects" to Neil Gallagher, Dana pulls a long needle out and Carissa says "What are you doing?" and in the shot then facing Dana you can see the tip of the boom microphone pass by in the top left of the screen. It's very quick but it's there. (00:21:00)
Visible crew/equipment: When we are first introduced to Frank and Carissa at the research centre you can see the camera and cameraman reflected in the glass doors as it moves in towards them. (00:16:17)
Visible crew/equipment: Near the end, when Alex kicks Neil into the elevator, you can see the hands of a crew member throwing the elevator doors shut, not the puppet. (01:14:13)
Visible crew/equipment: At the beginning of the movie, when the two assassins get out of the car, you can see crew members (filming from a low angle for Blade's POV) reflected in the car door as it opens. (00:04:47)
Continuity mistake: At the beginning of the movie, we see, from a POV shot, Blade running towards a road when the car carrying the two assassins pulls up in front of him and the two men get out. The shot then changes to an overhead view of the car. Blade should be visible in front of the car but isn't. (00:04:46)
Continuity mistake: When Blade's dragging the chair from Dana's door to Frank & Carissa's door, in the shot facing Blade his hook's above the crossbars of the chair leg, in the shots before and after, his hook's about two inches under the crossbars.
Continuity mistake: When Blade is knocking on Toulon's door, his hook is sideways, in the next shot, his hook is pointing down.