Ioan Gruffudd as Horatio Hornblower

Robert Lindsay as Captain Pellew

Cherie Lunghi as Duchess of Wharfedale

Christopher Fulford as Midshipman Hunter

Ronald Pickup as Don Massaredo

Jamie Bamber as Kennedy

Jonathan Coy as Lieutenant Bracegirdle

John Woodvine as Sir Hugh Dalrymple

Paul Copley as Matthews

Sean Gilder as Styles

Simon Sherlock as Oldroyd

Jean-Yves Berteloot as Etienne de Vergasse

Vincent S. Boluda as Spanish Lieutenant

Jolyon Baker as Captain Joubert

Colin MacLachlan as Master Bowles