Where To Stream Doctor Who Season 23 Episode 4
The Trial of a Time Lord, Part Four (The Mysterious Planet)
- Aired September 27, 1986
- 25 Min
- Rated 9.0
- Number 240 Of 700 Rated Episodes
Queen Katryca and the rest of the tribesmen arrive at the underground bunker where they confront Drathro The Immortal one. The Doctor tries to convince Drathro that he will repair the Black Light system while he fears that a possible upcoming explosion of the system could have the potential to destroy the universe.