Continuity: Chloe's mouth changes from open when she hits the ground struggling with Ian to closed when he is moving her unconscious body.

Plot hole: Chloe says the coroner found teeth marks on the foreman's bones. During the attack, at the beginning of the episode, the foreman only got a couple of scratches on his face and the rest of his clothes were perfectly fine and hadn't, in any way, been torn up. It would have taken the wolf tearing through the clothes, through the skin and, finally, through the muscle to leave any teeth marks on the foreman's bones and that did not happen.

Continuity: While he is being attacked by the wolf the foreman fires the flare gun with his arms spread, meaning that it would fly at an angle away from him. He then sees it arcing back from below toward him, impossible unless the flare changed direction and location in the air.

Visible crew/equipment: After Joseph gets locked out of the construction site, the worker, who locked him out, walks away. All the other workers at the site are gone, but when the shot returns to Joseph you can see the shoulder of someone standing between Joseph and the gate even though there should be nobody there.

Visible crew/equipment: After Kyla dies the scene goes to the construction site as Martha and Lionel get out of a SUV. As Martha gets out you can see the camera and film crew reflected in the window of the SUV.

Continuity: When Lex is talking to Lionel outside the building site at the end, Lex's sunglasses disappear while the camera is on Lionel and reappear when back on Lex. This happens after Lionel turns to face slightly behind Lex and continues throughout the rest of that exchange.

Continuity: When the wolf jumps out the window of the Luthor mansion there is no blood on the glass shards that are left in the window. As Clark goes to the window, there is, all of a sudden, a lot of blood present on the glass.

Audio problem: In the barn, as Kyla and Clark talk about Skinwalkers, Clark says "like the legend of Naman is just a story?". When the shot switches to Kyla you can see Clark is talking but no dialogue is heard from him.

Continuity: Joseph, Kyla and Clark are at the Talon, in the scene after Joseph is bailed out of jail. Martha comes in and walks over to the three of them. The next shot has her stopped next to Clark, with no forward movement to indicate she is still walking to him. In the shot after that she is still walking up to Clark.

Visible crew/equipment: While Clark and Pete are riding dirt bikes, you can see a crew-member in a green jacket in the bottom-right-hand corner of the screen in the shot where they go off the jump. In the next shot he has disappeared.

Continuity: As Clark walks up to Lex you can see the tip of Lex's cue stick is 3-4 inches away from the rail. Before Clark picks it up the stick is now right up against the rail.

Audio problem: When Whitney is tearing up the bathroom, he throws the door and we don't hear it land. I saw this on the DVD, so it was not a transmission problem.

Continuity: In the shot where Clark picks up Lex's cue stick, the balls on the table are spread out in an arch consisting of 4 balls. The shot switches to a low level shot looking at Lex and the balls at Lex's end, where the arch should be, are no longer forming an arch.

Revealing: When Tina puts the necklace on Clark to disable him, he falls to the ground of his barn. As he is lying there, his collar is very dark, and his shoulder is lit up. Since the source of the green light is supposed to be the necklace, his collar should be the brightest lit.

Factual error: Tina Greer disguised as Whitney walks down the hallway dressed in marine corps dress blues. His rank was a private first class, yet he had a blood stripe going down his pant legs. You do not receive the blood stripe until you reach corporal. Also the medals were wrong and some missing (i.e. combat action). The marine that comes to the house later and is killed by Tina Greer, had medals that were wrong as well.

Continuity: Lex and Clark are playing pool. Lex misses his shot on the 12 ball and scratches which leaves the 12 ball near the pocket. After Clark gets the cue ball, he makes his shot on a different ball and the 12 ball that was next to the pocket is gone without it being knocked into the pocket.

Audio problem: While talking about Tina Greer's suicide after Chloe says "lit a match" you can hear Pete say "okay" but you see his mouth doesn't move with the word.

Factual error: When the Marine officer comes to Whitneys house, he introduces himself as Lt. McNulty, but he is wearing the insignia of a Captain.

Continuity: After Clark sees Whitney and realizes that he may be Tina Greer the next scene is at the school newspaper The Torch. The first shot of the computer, as the camera pans past it, has a story about Whitney's return up front with the story about Tina Greer's "suicide" behind it. Even though nobody touches the computer in the time between shots the next shot of the screen has just the story on Tina Greer and Whitney's story is completely gone.

Continuity: When Clark and Lex were talking about Helena while playing billiards, Clark picks up the stripped blue ball. They then continue to talk as he plays with the ball in his hand. He then puts it back on the table allowing it to roll but now its has changed into the cue (white) ball and the stripped blue ball can be see in the foreground right next to the side pocket and a stripped red ball.