The Key to Time is the special featuring the Fourth Doctor. It is set right after 'the Pirate Planet'.
Previous Special: Escape of the Master
Next Special: Revenge of a Vicman
- The Fourth Doctor - Matt Moore
- Romana I - Matt Moore
- The Sontarans - Matt Moore
- Rutans - Matt Moore
- The Second Doctor - Matt Moore
Note: Footage from "The Pirate Planet" featuring Tom Baker & Mary Tamm is shown at the begining of the episode.
- Calufrax was build by hero_henrik on the Doctor Who Adventures server.
- The Doctor later searched for the Key to Time again in series 2 .
- This is the first time where Matt Moore voiced all the characters in the episode.
- The Second Doctor makes a cameo at the end of the episode where he steps into the wrong TARDIS.