The Doctor, Ben and Polly land on the HMS Victory during the Battle of Trafalgar. In the lull immediately before the fight with the Redoubtable, they must prove to Flag Captain Hardy they are not spies or deserters. The Doctor proposes to his companions that they try to do a bit more than that. He tells Polly that he aims to change history, but neither Ben nor she believe he is capable of that. He tries to give Nelson specific advice to avert his death, but, in the end, Nelson dies, anyway. Still, Ben seems to have changed history a tiny bit, by encouraging Nelson to send a message to the whole British fleet: "England expects that every man this day will do his duty."