Continuity mistake: All shots of the Jeep Cherokee prior to it crashing (and during the process of flipping over) show that it wears factory-optional silver steel wheels of a 'star' style. But as the wreck settles upside-down, it's wearing plain steel wheels (like those found under full wheel covers or on a spare tire).
Continuity mistake: Season 2, Episode 18: "Today Is The Day, Part 1" - At the beginning of the episode, Jesse hasn't gotten rid of Riley's body yet but has somehow found the time to replace her living room table which was broken in the previous episode, "Ourselves Alone", whilst fighting with Riley.
Continuity mistake: Season 2, Episode 5: "Goodbye To All That" - We see Marty Bedell playing on his Xbox 360 with a headset attached to his right ear. But when the T-888 arrives at his house to kill him and he goes to answer the door, the headset is gone. There was absolutely no time for Marty to remove the headset as the camera cuts too quickly.
Continuity mistake: When John and Pyle are at the shooting range, John's protective glasses are up on his head when he fixes Pyle's gun, down on his face when he fires the gun, back up on his head after firing and then back down on his face when he gives the gun back to Pyle. They're then back on his head before taking them off before the scene ends. (00:13:45)
Continuity mistake: *Season 2, Episode 21: "Adam Raised a Cain" - When James Ellison leaves the elevator after talking to Catherine Weaver, Catherine's fringe has changed from its original position. At first it was diagonally across her forehead, but when James leaves the elevator, it is swept back.
Continuity mistake: When Sarah throws Cameron out of the window after the rigged safe deactivates her, she lands on the roof of a car at the bottom with her legs straight, arms straight at a diagonal angle and her head looking straight up. But four shots later, she is lying on the car with her legs bent over the roof, her arms at a horizontal angle and her head looking to the left.
Continuity mistake: Season 2, Episode 21: "Adam Raised a Cain" - When the water delivery Terminator kills Debbie by shooting her in the head, there is no visible entry wound. But later when Derek finds her body, there is a bullet hole suddenly in the middle of her forehead.
Continuity mistake: Throughout most of the episode, the repeated conversations seen in each character's stories are slightly different to each other: the way certain lines are delivered, the position of the actors, etc. These scenes were most likely re-filmed.
Continuity mistake: After Sarah lies to get Cameron away from the cop, the collar on Cameron's jacket is folded forwards over her neck as she walks down the alley with Sarah. She then tells Sarah that it's 13 miles to walk home and that they need another car. In the following shot, her collar is folded back towards her shoulders.
Continuity mistake: In the scene where Derek shows John his past self playing baseball with Kyle Reese, Derek hits the ball towards John, John picks it up and then gives it to Kyle. As Derek hits the ball towards John, he is holding the bat at an upwards angle towards the right. But in the next shot of him, he is holding the bat at a downwards angle towards the left. The ball also travels in the opposite direction to what it did previously.
Continuity mistake: As the FBI agent shows his ID to Dixon, it is in his right hand, the badge end up. He holds a folder in his left hand. The camera cuts away for just a moment, then returns to show the ID in his left hand, badge to the right, and the folder is in his right hand, all without enough time to make the switches. (00:08:55)
Continuity mistake: As Cromartie is approaching the Dyson home, he carries an automatic rifle with his right arm. As he makes a turn toward the left, he lowers the rifle down to his side, pointing it at the ground. He hears a car start and an instant camera angle change shows the rifle is still pointed forward and upward, not down, with no time for the change. (00:32:55)
Continuity mistake: Ep. "Samson and Delilah" - When the Jeep Cherokee flips, it lands on the driver-side/rear corner of its roof, completely collapsing that corner of the roof. The camera angle changes and instantly the Jeep is landing on both of its driver-side tires, roof intact, and rolls onto its left side. The angle changes again, and the collapsed roof is back as the Jeep slides a bit more before the shot changes again, and the undamaged roof is shown as the Jeep rolls onto its roof and comes to a stop. The camera pans around the rear of the wreck, and there is no roof collapse at either rear corner.
Continuity mistake: As Cameron is questioned about the girl that commited suicide, the interviewer holds a photo of one of the mostly-black posters. When we see his view of the photo, the white letters spell 'DAN', but before and after that shot, when we see his face, we can see through the photo, and it only reads 'A', which is a different poster seen earlier in the same episode. (00:22:55)
Continuity mistake: Ep. "Samson and Delilah" - As Derek sits at the table, Sarah is digging jelly from a jar with a knife, moving it onto toast that sits on a plate on the table. The shot instantly reverses and the jar is on the table and she's spreading the jelly with the knife on the toast she now holds in her hand.