Baltazar is aboard his spaceship looking upon a digital display of the Earth. Caw is with him, in a spherical cage. Baltazar gives the order for the plasma cannons to prepare to fire upon the Earth.
The Doctor is flying the TARDIS at high speeds, when Caw catches it in flight, and takes it to his home planet of Pheros. He gives Martha a brooch, a present for saving him.
The Doctor and Martha land on the first planet - called Boukon, a world heated by artificial suns and where Oil Corporation is taking the last of the oil to fuel the empire, because they ran out on Earth.
