The Fourth Doctor and Adric learn from the wizened Keeper of Traken that a great evil has come to his planet in the form of a Melkur - a calcified statue. The Keeper is nearing the end of his reign and seeks the Doctorís help in preventing the evil from taking control of the bioelectronic Source that is the keystone of the Traken Unionís civilisation.
The Melkur, via various deceptions, becomes the next Keeper. It is then, however, revealed to be the Masterís TARDIS. Its owner, still blackened and emaciated, hopes to use the Sourceís power to regenerate himself. The Doctor manages to expel him and install a new Keeper in his place, but in a last minute ploy the Master traps one of the Traken Consuls, Tremas, and merges with his body before fleeing the planet.
The set contains the following: - The Fourth Doctor in Waistcoat action figure.
- The Master Decayed action figure.
- The Melkur Statue action figure.
- Masterís TARDIS as a Grandfather Clock
- Source Manipulator Sphere accessory