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.
Trivia: During production of this story, Peter Davison (The Doctor) and Janet Fielding (Tegan) announced their departures from the series. Producer John Nathan-Turner had offered Davison a fourth season in his role, but he feared being typecast if he stayed beyond three years on the programme.
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.
Trivia: Colin Baker also provides the voice of a Jacondan at Freighter Control in part three of this story.
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: In 'The Five Doctors', three separate Cyberleaders are definitely used. So it's likely that Cyberleaders are like unit commanders, of which a fair-sized army might have several.
Daria Sigma