The story of the Nightjar has been told for many years. A spaceship helmed by the legendary Captain Goben on a vital mission of mercy, delivering medical supplies to a distant colony in the middle of devastating war, an act of bravery that triggers the end of the conflict.

At her heels throughout the journey, her pursuer, the spaceship Nemesis, helmed by the dogged Captain Eslo, never quite able to catch her target. The Doctor has always wanted to witness these historic events. And now, alongside Nyssa and Tegan, he's got his chance.

But history might just have other ideas.