When an outpost in space begins to break up, with the TARDIS crew aboard, escape is only possible in tiny life-capsules. Fitz is bundled unconscious into one, while the Doctor and Compassion take another. Steering the capsule back to its planet of origin to try and get help, the Doctor finds a hostile welcome awaits. Fitz's capsule takes him to the apparent safety of the colony of Mechta. The Doctor decrees that Fitz's new-found utopia must be totally destroyed.