The Aztecs - S1-E6
Revealing mistake: In the final fight, Ixta sends Ian staggering into the altar, which slides out of position across the floor. Also, at one point the edge of the raised set they're fighting on is visible briefly.
The Aztecs - S1-E6
Other mistake: During the sacrifice scene, the camera bumps into some scenery and suddenly lurches.
Visible crew/equipment: Part 4, A Race Against Death: The Doctor chides the First Elder about Ian's illness and says, "I must have chemicals and equipment; his death will be your fault and yours alone." Then, just as the Second Elder appears and says, "Sir," the boom mic (with white end) swings up between the two Sensorites, and we also see the diagonal boom pole moving at the left side of the screen.
Other mistake: In episode one, when the crew wonders what The Sensorites will do to them, the camera zooms in on the Doctor as he says, "or kill us?" It then jerks with an audible click as though hitting something.
Continuity mistake: Part 6, A Desperate Venture: The new Second Elder threatens Carol and has her write a note to John. When Carol hands the finished note to the new Second Elder, this close-up dissolves into another close-up of the note being held by Barbara. Carol's note is quite different in both of these close-ups.
Visible crew/equipment: Part 5, Kidnap: In the Sensorite lab, the Scientist shows the Doctor and Ian a collection of things left behind by the humans, who were killed in the spaceship explosion. When Ian flips through the family snapshots, the shadow of the boom mic passes over Ian's forehead. It happens again just as Susan blurts, "The City Administrator, of course!"
Visible crew/equipment: Part 4, A Race Against Death: While Susan is with Ian and the First Elder, Ian tells her, "The Doctor must have run into a snag..." When Susan replies that she's going to find out why, just as she stands up a boom mic becomes visible at the top right side of the screen, and it's pulled up out of view. Then, as the First Elder says, "I will have you conducted to the laboratory," the shadow of the boom mic is on his head.
Visible crew/equipment: Part 4, A Race Against Death: After the Doctor states he's going off on an expedition, John still struggles to warn the Doctor, and when the Doctor tells Carol, "Now you stay with him, I think he's getting better," a boom mic becomes visible at the top left side of the screen.
Visible crew/equipment: Part 3, Hidden Danger: When the First Elder tells the Doctor, Ian, and Susan about their refined aqueduct water beneath the city, Ian drinks some of it. Then just after the Doctor says, "Vintage water," the tip of the boom mic sweeps across the top of the screen.
Character mistake: A Sensorite says, "Give my Doctor the congratulations," instead of "Give the Doctor my congratulations," in the fourth episode.
Continuity mistake: Drill marks are visible on the door before Maitland uses the drill on it.
Visible crew/equipment: When the Doctor and Ian enter the house in episode one, there is a shadow of the camera on the wall next to Ian.
Character mistake: The miniaturized TARDIS crew never interact with the other characters in this story, because, as the Doctor points out, the 'giants' will be unable to hear them, as their voices will be on a different wavelength. So why does the Doctor later suggest using the telephone to try to call for help?
The Dalek Invasion of Earth - S2-E2
Other mistake: Ian has completely forgotten the distinctive shape of a Dalek. It's only when the Dalek starts speaking that Ian says to the Doctor, "that voice". Yet later when they are at the saucer, he talks to the Doctor about the new back of the Dalek having a disk on them now.
The Dalek Invasion of Earth - S2-E2
Factual error: The Doctor states that The Daleks invaded Earth because it is the only planet with a magnetic core. In fact, every planet in the solar system has a magnetic core.
The Dalek Invasion of Earth - S2-E2
Audio problem: In episode 2 you can hear the Black Dalek clear his throat before speaking.
The Dalek Invasion of Earth - S2-E2
Revealing mistake: When Barbara is throwing her bombs, she grabs the window frame in front of her, which wobbles alarmingly.
The Dalek Invasion of Earth - S2-E2
Audio problem: When the Doctor says that what they're seeing now is the middle period of Dalek history, you can hear a metallic thing being dropped off screen.
The Dalek Invasion of Earth - S2-E2
Visible crew/equipment: When the Doctor and Ian are talking about the discs on The Daleks' backs, you can see a female crewmember behind the robomen, standing there and then walking off, and then another crewmember in a white shirt dart past the robomen.
The Dalek Invasion of Earth - S2-E2
Continuity mistake: The paint on the Black Dalek changes between episode 2 and 3.
Answer: It was never destroyed on-screen; it was intact at the end of the TV movie, and destroyed by the start of the 2005 series. It was destroyed in the novel "The Ancestor Cell," but in a completely different manner to what happened in the series.
DaveJB