Hornblower must deliver a French nobleman to a secret rendezvous near Brest, all while coping with enemy agents in his own ranks.

Ioan Gruffudd
as Horatio Hornblower

Robert Lindsay
as Admiral Sir Edward Pellew

Paul McGann
as Lieutenant Bush

Lorcan Cranitch
as Wolfe

Tony Haygarth
as Master Prowse

Julia Sawalha
as Maria Mason

Paul Copley
as Matthews

Sean Gilder
as Styles

Greg Wise
as Major Côtard

Ian McElhinney
as Captain Hammond