Zeta Major
Simon Messingham
 The Fifth Doctor returns to the planet Morestra, which he had visited two thousand years ago. The ruling class has become a theocracy and is trying to return to stealing crystals from Zeta Minor. This energy-granting plan did not work so well long ago and is again causing problems now. The Doctor tries to deal with the fallout of this situation while his companions are sucked into Morestra court intrigue.