The World Shapers (comic story)

Summary
Responding to a distress call, the Doctor arrives on Marinus where he finds a dying Time Lord. As the Time Lord dies, his last words are "Planet 14". This triggers a memory for the Doctor and goes off to Scotland to visit a now very old Jamie McCrimmon. He reminds the Doctor that the Cyber-controller remembered the two of them from Planet 14 and they return to Marinus to find that, in the week that they’ve been away, an age has passed on the planet and it's now a barren rock. The Voord are evolving into the Cybermen with the aid of a worldshaper, which they plan to use to devastate the galaxy. Jamie sacrifices his life to destroy the worldshaper and the Time Lords arrive to stop the Doctor interfering more than he should.

Characters

 * Sixth Doctor
 * Frobisher
 * Peri
 * Jamie McCrimmon
 * The Voord
 * The Cybermen

Continuity
This strip was the last consistent Sixth Doctor comic strip adventure. In the course of the strips, Mel had never joined The Sixth Doctor on his travels.

The Vrood are revealed to be variations of The Cybermen, though fans have argued this does not make much canocial sense. It is theoretically possible The World-Shapers were merely supplied to The Vrood by The Cybermen themselves, with the intention of secretly terraforming Marinus into a new Mondas

The Time Lords reveal that The Cybermen will eventually evolve beyond thier capacity for assimilation and ascend to a state of pure consciousness.