Visible crew/equipment: In episode one, the Doctor and Sarah crouch behind a pod to escape the android laser fire. They lie on a large brown piece of cloth conveniently placed to keep them from getting dirty.
Revenge of the Cybermen - S12-E5
Visible crew/equipment: Quite a few times during this story arc you can see Vogans without their gold eye make-up so you can see human coloured eyelids when the rest of them is all brown.
The Daleks' Master Plan - S3-E4
Visible crew/equipment: At the beginning of episode 2 when The Daleks are talking, a stage light is reflected on one of The Daleks.
Visible crew/equipment: When the Doctor and Kimus are breaking into Xanxia's room, an ordinary telephone is visible on the right of the screen.
The Evil of the Daleks - S4-E9
Visible crew/equipment: When the Doctor and Jamie enter the secret room watch the top left corner. A boom mike shadow appears and then moves out of shot.
Earthshock - S19-E6
Visible crew/equipment: Just after the Doctor has explained the anti-matter to Adric, the shadow of the boom mike is visible in his blonde hair.
Visible crew/equipment: When Leela bandages Toos' arm, a member of the crew is visible on the edge of the set.
The Talons of Weng-Chiang - S14-E6
Visible crew/equipment: The shadow of a boom mike is visible on the curtains near the stage in the final fight.
Genesis of the Daleks - S12-E4
Visible crew/equipment: In episode 1, when General Ravon is being held at gunpoint and he says 'they won't last much longer', the shadow of the boom pole is moving on the door behind him. (00:15:15)
Visible crew/equipment: The boom mike can be seen in the first scene set at the stones in the upper right corner of the screen.
The Talons of Weng-Chiang - S14-E6
Visible crew/equipment: In episode six, when the Doctor and his friends are hiding behind the table and Mr. Sin is blasting it, look out for the pyrotechnic wire dangling from the underside of the table.
Genesis of the Daleks - S12-E4
Visible crew/equipment: Just after The Daleks move past the Doctor and the female Thal soldier in the corridor, a piece of lighting equipment is reflected on the wall behind her. (00:08:00)
Visible crew/equipment: Episode 5, while Zoe and Jamie are at the Weather Control Station, when they hear the Ice Warrior approaching they both hide, and the actor's T-mark is visible on the floor. (00:18:00)
Visible crew/equipment: (Episode 5) When Vicki is in the jungle she happens upon the TARDIS and bangs on the door begging to be let in. In the next shot we can see the boom pole/mic hovering in the background, then a hand appears which seems to guide the actress to head in that direction. (00:07:45)
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.
Attack of the Cybermen - S22-E1
Visible crew/equipment: Just after the Cyber Leader orders that Flast be thrown out of the refrigerated room, one of the floor crew can be seen kneeling behind some crates. (01:20:50)
Visible crew/equipment: When Susan runs out into the console room in a panic, the shadows of two crew can be seen on the wall.
Visible crew/equipment: In episode four, when Ian and the Doctor descend the stairs into Frankenstein's lab, you can see a boom operator and mic behind Ian, at the left side of the screen.
Visible crew/equipment: In episode one, when Dai Evans is on the telephone in the mine, an arm of a crew member appears to the bottom right of the screen, giving the actor his cue to speak.
Visible crew/equipment: Near the end of episode five as The Daleks plan their attack, a BBC camera can be seen in the background on the right. (00:21:20)
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