Admiral Pellew interrupts Hornblower's wedding reception and tasks him to locate a British ship which has disappeared off the French coast, where Napoleon's troops are engaged in covert activities.
Duty is the eighth and final episode of the British TV series Hornblower, based on the 1962 book Hornblower and the Hotspur by C.S. Forester. It was released on 6 January 2003, a day after episode 7: Loyalty.