Fortunately, the Doctor has managed to make off with the taranium core of the Time Destructor, thus disrupting the Daleks' plans. Fleeing from the Daleks in Mavic Chen's Spar ship, the Doctor, Steven, Katarina and Brett are forced to land on a prison planet called Desperus. He holds Katarina hostage in the ship's airlock, but she opens the outer door and they are both ejected to their deaths in space. There, the Doctor contrives to steal the Time Destructor and turn it against the Daleks, annihilating them. Who serial ever recorded, and is considered one of its greatest epics.
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