The Master is a recurring character in the British science fiction television series Doctor Who and its associated spin-off works. The character is a renegade alien Time Lord and the archenemy of the title character the Doctor. The Master has been played by multiple actors since the character's introduction in 1971.
The Master, played by Roger Delgado, makes his first appearance in Terror of the Autons (1971), where he allies with the Nestene Consciousness to help them invade Earth. The Third Doctor (Jon Pertwee) convinces the Master to stop this plan at the last minute, and the Master subsequently escapes, albeit with his TARDIS, a space-time ship, left non-functioning after the Doctor confiscates the ship's dematerialisation circuit. Having become a main character in the show's eighth season, the Master reappears in The Mind of Evil, where he regains his TARDIS' circuit from the Doctor after attempting to launch a nerve gas missile that would initiate World War III. After another incursion on Earth in The Claws of Axos, and failing to hold the galaxy to ransom using a doomsday weapon on the planet Uxarieus in the year 2472 in Colony in Space, in The Daemons the Master is finally captured on Earth by the organisation UNIT after Jo Grant (Katy Manning) prevents the alien Azal (Stephen Thorne) from gifting the Master his powers. In The Sea Devils (1972), the Master is shown to be imprisoned on an island prison off the coast of England. He convinces the governor of the prison, Colonel Trenchard (Clive Morton), to help him steal electronics from HMS Seaspite, the nearby naval base, which helps the Master contact the reptilian Sea Devils, the former rulers of Earth, so he can help them retake the planet from humanity. The Master convinces the Doctor to help him build machinery that would bring the Sea Devils out of their millions of years of hibernation, but the Doctor sabotages the device by overloading it, destroying the Sea Devil base and preventing war between humanity and reptiles. The Master subsequently escapes in a hovercraft. The Doctor reveals in this serial that the Master was once a "very good friend" of his. Delgado's last appearance as the Master is in Frontier in Space (1973), where he works alongside the Dalek and Ogron races to provoke a war between the Human and Draconian Empires. The scheme fails, and the Master escapes after he shoots at the Doctor. Delgado was slated to return in a serial called The Final Game, which would have been the season 11 finale. However, he died in a car crash in June 1973 and the story was never filmed.

Q: What is Encounters with the Third Doctor?
A: The Third Doctor (Jon Pertwee) convinces the Master to stop this plan at the last minute, and the Master subsequently escapes,

Q: Who encounters the Third Doctor?
A: unknown

Q: Who is The Master?
A: The Master, played by Roger Delgado, makes his first appearance in Terror of the Autons (1971), where he allies with the Nestene Consciousness to help them invade Earth.

Q: Is there anything interesting about this article?
A: Having become a main character in the show's eighth season, the Master reappears in The Mind of Evil, where he regains his TARDIS' circuit from the Doctor
Why is he imprisoned?
He convinces the governor of the prison, Colonel Trenchard (Clive Morton), to help him steal electronics from HMS Seaspite, He convinces the governor of the prison, Colonel Trenchard (Clive Morton), to help him steal electronics from HMS Seaspite, He convinces the governor of the prison, Colonel Trenchard (Clive Morton), to help him steal electronics from
He convinces the governor of the prison, Colonel Trenchard (Clive Morton), to help him steal electronics from