The Dalek Invasion of Earth - S2-E2
Visible crew/equipment: When the rebels attack the Dalek saucer, a Dalek asks what sector the prisoners were taken from, and in the bottom left hand corner a giant boom mike comes into view.
The Dalek Invasion of Earth - S2-E2
Revealing mistake: In episode 1, one of the windows on the TARDIS is leaning in, but by the time we get to episode 6 it has managed to fix itself. Also when the bridge falls down you can see the poster through the gap, showing that there is no back to the TARDIS.
The Dalek Invasion of Earth - S2-E2
Visible crew/equipment: As the two prisoners join the Doctor and Ian, the camera follows them and you can see the heliport set through the Dalek saucer.
The Dalek Invasion of Earth - S2-E2
Audio problem: When the Dalek says to give the Doctor and Ian the test, it cuts to the prison cell where you can hear a Dalek voice that gets cut off.
The Dalek Invasion of Earth - S2-E2
Revealing mistake: When Barbara, Jenny and Dortman are running through the deserted streets of London, in the very last shot, if you look to the left of the screen, you can see some people walking down the street.
The Dalek Invasion of Earth - S2-E2
Revealing mistake: When a rebel throws a bomb from the second floor of the Dalek saucer, notice it explodes too early and in the wrong place.
The Dalek Invasion of Earth - S2-E2
Visible crew/equipment: Just before Dortman leaves to test out his bomb, he comes towards the camera. When he's doing this, look at the right side of the screen - you can see a crewmember's shadow. It can't be Barbara or Jenny because they then enter from the left.
The Rescue - S2-E3
Revealing mistake: At the beginning, as the Doctor is standing in the TARDIS door, the cave wall can be seen through the TARDIS.
The Rescue - S2-E3
Revealing mistake: When Barbara fires at Vicki's pet, a firework falls off the gun.
The Romans - S2-E4
Factual error: Nero seems to be middle-aged, but the historical Nero was 27 at the time Rome burned.
The Romans - S2-E4
Factual error: The geographical references in this story are somewhat suspect. Assissium is the modern town of Assissi, some 70 miles north of Rome and the same distance east from the sea. The Great Fire of Rome took place in July 64AD.
Revealing mistake: In the end part of this story, in the large spider's den, the string supporting it is visible.
Deliberate mistake: In episode 3 of 'The Web Planet' (titled 'Escape To Danger') watch as one of the Zarbi operators, his vision impaired by the costume, runs right into the camera. So far behind schedule was the recording of this episode, however, that this mistake was retained in the finished episode, as there was no time left for a re-take.
Visible crew/equipment: In the scene where Ian's pen vanishes, as he checks to see if he is being followed you can see a boom mic shadow on his coat.
Visible crew/equipment: Early in the first episode, a huge power cable can be seen on the TARDIS floor. Maureen O'Brien even steps over it. This cable isn't visible in any other scenes.
Visible crew/equipment: At the beginning of episode two, the Doctor finds Ian unconscious with a very obvious shadow of the camera and cameraman looming over him.
Visible crew/equipment: In an early TARDIS scene, at one point the cable powering the console is seen running from the base and under the wall.
Visible crew/equipment: At the end of episode 3, a venom grub starts chasing Ian. As it enters the screen however, you can see the actor under it crouching down.
Continuity mistake: In episode one, Vicki passes her hand through a museum display, making the point that the crew cannot interact with their environment. A moment later, she bumps into a statue, making it wobble.
Visible crew/equipment: (Episode 4) After Ian shudders from the apparition he continues to follow The Doctor down the hall, and the camera casts a shadow on Ian. Then, when The Doctor finds the stairs leading to the laboratory he tells Ian he must see what's on the table. Just as Ian states his displeasure at the thought, the boom mic (and its shadow) pops up into view at the bottom of the screen, in front of Ian. (00:05:15)
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