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)
Visible crew/equipment: Season 2, Episode 21: "Adam Raised a Cain" - When James Ellison leaves the elevator after talking to Catherine Weaver, a camera is reflected in the elevator door on the far right of the screen.
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: Season 2, Episode 21: "Adam Raised a Cain" - When the water delivery Terminator kills Derek there is no visible entry wound. But a few shots later there is a bullet hole suddenly in the middle of his forehead.
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: Season 2, Episode 19: "Today Is The Day, Part 2" - When Queeg tells Jesse to secure all side arms and plasma rifles, take Officer Goodnow's body to the cool room and return to duty, he walks halfway up the metal staircase behind him twice.
Mr. Ferguson is Ill Today - S2-E8
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.
Revealing mistake: Some of the security cameras in the Weaver's household are in some rather odd locations. We see a camera's point of view of Savannah looking up through the glass table that she's doing her homework on, and a camera's point of view of Savannah hiding behind the TV. Besides the obvious need for John Henry to keep an eye on her, what is the need for these cameras? And where are they placed? Later on in the episode, when John Henry is talking to James Ellison about why he stopped looking for Sarah Connor, pretty much all of the cameras on the wall next to them are recycled shots from the actual show and couldn't possibly be from physical cameras due to their awkward angles.
Visible crew/equipment: When John gets back from seeing Riley's body, he sits down at the kitchen table in front of Sarah. Sarah tells him he shouldn't have gone. John then says, "It was a risk, I know". As he says this, the shadow of a boom mic can be seen on the wall behind him.
Mr. Ferguson is Ill Today - S2-E8
Revealing mistake: In Cameron's Story, in the scene with her and Derek, Derek's phone rings. When he looks at the screen it shows a telephone number and the words "EDIT" and "BACK" in the bottom corners. The phone is not in fact ringing at all. Derek is merely looking at the details of a contact saved on the phone.
Revealing mistake: When Catherine Weaver is killing all the employees of Desert Canyon Heat and Air in its warehouse, some of the employees fall to the ground with no signs of any entry wounds or blood on their bodies.
Visible crew/equipment: At the beginning when Sarah, John, Cameron and Derek are driving past the dead cows, the shadow of a camera can be seen on the inside of the passenger door that Sarah is sitting in.
Other mistake: Season 2, Episode 20: "To the Lighthouse" - In the flashbacks to the jungle, John is considerably younger. Sarah however, is not. Adults don't change nearly as much as a child would in the same time period, but this is a pretty big jump back in time. John is only a child in the flashbacks, putting Sarah in her mid to late 20s. Yet she still looks 35 and even has the exact same skin and facial structure.
Plot hole: When John inserts Cameron's CPU, she restarts nearly instantly. She recognizes John right away and speaks to him by name. Yet seconds later, we see through her eyes as her system reports recognizing him, but she already does.
Revealing mistake: When Sarah breaks the window to distract the Police Deputy, the door that the Deputy kicks in opens before he kicks it.
Revealing mistake: When Sarah and John leave the chapel after attempting to disable Cameron, they run across the road and almost get hit by a car. Watch Sarah's face in the close up shot: she's trying not to laugh and is somewhat smiling.
Visible crew/equipment: When John and Derek arrive at the school, a crew member is visible in the car's right wing mirror. (00:06:00)
Answer: It was cancelled due to declining ratings. Season Two had about half as many viewers as Season One.
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