The Caves of Androzani - S21-E6
Trivia: On the DVD commentary, Peter Davison remarks that when Christopher Gable whacked him across the face with the back of his hand, it actually hurt quite a bit, even though they'd discussed it beforehand. Davison believes that Gable couldn't see him properly with his mask on, although a more likely explanation is that Gable got too carried away.
The Caves of Androzani - S21-E6
Trivia: Robert Glenister (Salateen) had starred with Peter Davison in the BBC sitcom Sink or Swim, in which they played brothers Brian and Steve Webber.
The Caves of Androzani - S21-E6
Trivia: This was the final regular appearance of Peter Davison as the Doctor and his favourite serial from his three years on the programme. Davison has said that if he were given more scripts like "The Caves of Androzani" earlier in his run, he might have been persuaded to stay for a fourth season.
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