Parallel stories: 18th century Harrison builds the marine chronometer for safe navigation at sea; 20th century Gould is obsessed with restoring it.
John Harrison
Rupert Gould
William Harrison (Adult)
John Campbell
Lord Sandwich
Elizabeth Harrison
Sir Edmund Halley
Muriel Gould
Lord Morton
Nevil Maskelyne
Dr. Bliss
Adm. Sir Cloudsley Shovell
Capt. Ainsley
William Harrison (Young)
George Graham
Sir Charles Pelham
Christopher Irwin
Capt. Proctor
Army Doctor
Sir Kenelm Digby
Capt. Bourke
Lt. Draper
Waddington, Gould's solicitor
Halley's Secretary
Lt. Seward
Capt. Lindsay
Edmund Burke
Dodo Gould
John Jefferies
Mr. Greene
King George
Capt. Man
Roger Wills
Grace Ingram
Surgeon
Whiston
Queen Charlotte
Arthur Mason
