Rupert Gould (unknown episodes)
Muriel Gould (unknown episodes)
Laura Gurney (unknown episodes)
Nevil Maskelyne (unknown episodes)
Dr. Bliss (unknown episodes)
John Harrison (unknown episodes)
William Harrison (unknown episodes)
Lord Sandwich (unknown episodes)
Lord Morton (unknown episodes)
Dodo Gould (unknown episodes)
Elizabeth Harrison (unknown episodes)
John Jefferies (unknown episodes)
BBC Producer (unknown episodes)
Captain Campbell (unknown episodes)
Surgeon (unknown episodes)
Lt. Seward (unknown episodes)
Captain Digges (unknown episodes)
Learmouth (unknown episodes)
Lt. Williams (unknown episodes)
Sir Frank Dyson (unknown episodes)
Commodore Forrest (unknown episodes)
Inn Landlord (unknown episodes)
Captain Bourke (unknown episodes)
Lt. Bandelwine (unknown episodes)
Bosun (unknown episodes)
Marine (unknown episodes)
BBC Researcher (unknown episodes)
Christopher Irwin (unknown episodes)
Mr. Greene (unknown episodes)
Captain Lindsay (unknown episodes)
Governor (unknown episodes)
Amy (unknown episodes)
Doctor (unknown episodes)
Observatory Assistant (unknown episodes)
Young Assistant (unknown episodes)
Lady Curator (unknown episodes)
Grace Ingram (unknown episodes)
King George (unknown episodes)
Queen Charlotte (unknown episodes)
Dr. Demainbray (unknown episodes)
Callboy (unknown episodes)
Edmund Burke (unknown episodes)
John Campbell (unknown episodes)
Sir Kenelm Digby (unknown episodes)
George Graham (unknown episodes)
Sir Charles Pelham (unknown episodes)
Sir Edmund Halley (unknown episodes)
Adm. Balchen (unknown episodes)
Adm. Wagner (unknown episodes)
Capt. Proctor (unknown episodes)
Lt. Draper (unknown episodes)
Waddington (unknown episodes)
Estate Manager (unknown episodes)
Society Lady (unknown episodes)
Roger Wills (unknown episodes)
Arthur Mason (unknown episodes)
Adm. Sir Cloudsley Shovell (unknown episodes)
Minister for the Navy (unknown episodes)
Jos Killick (unknown episodes)
Whiston (unknown episodes)
Rear Admiral (unknown episodes)
Ditton (unknown episodes)
Lt. Bertie (unknown episodes)
Dr. Bradley (unknown episodes)
Lt. Knorvler (unknown episodes)
Army Doctor (unknown episodes)
Observatory Porter (unknown episodes)
Staff Nurse (unknown episodes)
James Harrison (unknown episodes)
Young William Harrison (unknown episodes)
Dyson's Secretary (unknown episodes)
Capt. Ainsley (unknown episodes)
Halley's Secretary (uncredited) (unknown episodes)
Capt. Man (uncredited) (unknown episodes)
Courtesan (uncredited) (unknown episodes)
Lieutenant (uncredited) (unknown episodes)
Nurse (uncredited) (unknown episodes)
Clock Box Carrier (uncredited) (unknown episodes)
Portuguese Child (uncredited) (unknown episodes)
Carpenter (uncredited) (unknown episodes)
WW1 Soldier (uncredited) (unknown episodes)
Narrator (uncredited) (unknown episodes)
Marine (uncredited) (unknown episodes)
Cecil Gould (uncredited) (unknown episodes)
Lt. Chester (uncredited) (unknown episodes)
Naval Captain (uncredited) (unknown episodes)
Sailor (uncredited) (unknown episodes)
Blonde Girl (uncredited) (unknown episodes)