Justin Salinger as Donald Crowhurst

Amy Loughton as Clare Crowhurst

Christopher Hale as Rodney Hallworth

Simon Armstrong as Archie

Tom Sawyer as Harry

Hugh Hayes as Barry Sanderson

Edwin Flay as Peter Porter

Michael Harkin as Robin Knox-Johnson

Marcus May as James Crowhurst

Haydn May as Simon Crowhurst

Austin May as Roger Crowhurst

Agatha Cameron Kettle as Rachel Crowhurst

Chris Ayles as Edward

Eric Colvin as Ronald

Glyn Dilley as Stanley Best

Adrian Harris as Adam Cunley-Jones

Nicky Jordan as Louick Fougeron

Chris Poole as Nigel Tetley

Richard Lee as Bill King

Lewis Nicolas as Santiago Franchessi

Gavin Nolan as John Ridgeway

Myrian Oje-Da Patino as Lucille

Philip Perry as Alex Carozzo

Chris Wilkinson as Bernard Moitessier