Set in 1807 during the Napoleonic Wars, "Captain Horatio Hornblower R.N." follows Captain Horatio Hornblower as he commands the HMS Lydia on a secret and perilous mission around Cape Horn and into the Pacific. Neither his men nor his officers know their destination or the purpose of their voyage. Britain is at war with Napoleon, and Hornblower's orders eventually lead them to the Pacific coast of Central America. There, they are tasked with aiding Don Julian Alvarado, who plans to attack France's Spanish allies in North America, hoping to divert French military resources. The situation changes rapidly: after capturing a Spanish galleon and handing it to Alvarado, Hornblower learns that Spain has become an ally of England, and he must recover the ship. Complicating matters further, Hornblower takes aboard a distinguished and attractive passenger, Lady Barbara Wellesley, the sister of the Duke of Wellington. Cast: - Gregory Peck as Captain Horatio Hornblower, R.N. - Virginia Mayo as Lady Barbara Wellesley - Robert Beatty as First Lieutenant William Bush - Terence Morgan as Second Lieutenant Gerard, gunnery officer - Moultrie Kelsall as Third Lieutenant Crystal, navigator - James Kenney as Midshipman Longley - James Robertson Justice as Seaman Quist - Denis O'Dea as Rear Admiral Sir Rodney 'Mucho Pomposo' Leighton - Richard Hearne as Polwheal, Hornblower's steward - Michael Dolan as Surgeon Gundarson - Stanley Baker as Mr. Harrison, bosun - Alec Mango as El Supremo / Don Julian Alvarado - Christopher Lee as the Spanish captain of the Natividad - Diane Cilento as the voice of Hornblower's wife Maria Runtime: 117 minutes.