Mystery Message (short story)

Mystery Message was a short story published in Doctor Who Annual 1978. It featured the Fourth Doctor.

Summary
Visiting the planet Penadron, the Fourth Doctor is about to visit the Senate, but a coded message from an anonymous source allows him to realise in time that the Senate are actually malevolent, intending to kill him to extract all his knowledge from his brain.

Characters

 * Fourth Doctor

Worldbuilding

 * The message is written in code.

Continuity

 * The Doctor's brain holds highly valuable knowledge. (TV: The Rings of Akhaten, Nightmare in Silver)