Ian Hart

William Harrison

Michael Gambon

John Harrison

Jonathan Coy

Adm. Sir Clowdisley Shovell

Jeremy Irons

Rupert Gould

Peter Cartwright

Army Doctor

Gemma Jones

Elizabeth Harrison

Christopher Hodsol

Capt. Ainsley

Anna Chancellor

Muriel Gould

Christopher Hodsol

Captain Ainsley

Stephen Fry

Sir Kenhelm Digby

Emma Kay

Laura Gurney

Samuel West

Nevil Maskelyne

Ian McNeice

Dr. Bliss

Bill Nighy

Lord Sandwich

Brian Cox

Lord Morton

Barbara Leigh-Hunt

Dodo Gould

Peter-Hugo Daly

John Jefferies

Gary Waldhorn

Commodore Forrest

Tim McInnerny

Christopher Irwin

Hugh Simon

Doctor

Alfred Burke

Rear Admiral

Michael Cochrane

Waddington

Nigel Davenport

Sir Charles Pelham

Roger Lloyd Pack

Capt. Man (uncredited)

Tobias Menzies

Halley's Secretary (uncredited)