Michael Gambon

John Harrison

Jeremy Irons

Rupert Gould

Ian Hart

William Harrison (Adult)

Andrew Scott

John Campbell

Bill Nighy

Lord Sandwich

Gemma Jones

Elizabeth Harrison

John Wood

Sir Edmund Halley

Anna Chancellor

Muriel Gould

Brian Cox

Lord Morton

Samuel West

Nevil Maskelyne

Ian McNeice

Dr. Bliss

Jonathan Coy

Adm. Sir Cloudsley Shovell

Christopher Hodsol

Capt. Ainsley

Liam Jennings

William Harrison (Young)

Peter Vaughan

George Graham

Nigel Davenport

Sir Charles Pelham

Tim McInnerny

Christopher Irwin

John Standing

Capt. Proctor

Peter Cartwright

Army Doctor

Stephen Fry

Sir Kenelm Digby

Daragh O'Malley

Capt. Bourke

Cliff Parisi

Lt. Draper

Michael Cochrane

Waddington, Gould's solicitor

Tobias Menzies

Halley's Secretary

Charles Edwards

Lt. Seward

Pip Torrens

Capt. Lindsay

T. P. McKenna

Edmund Burke

Barbara Leigh-Hunt

Dodo Gould

Peter-Hugo Daly

John Jefferies

John Normington

Mr. Greene

Nicholas Rowe

King George

Roger Lloyd Pack

Capt. Man

Trevor Cooper

Roger Wills

Lucy Akhurst

Grace Ingram

Peter Penry-Jones

Surgeon

Mark Tandy

Whiston

Heike Makatsch

Queen Charlotte

William Thomas

Arthur Mason