David Robb

as Professor John Greville (1 episode)

as Dr Clarkson

as David

as Lord Wolfenden

as Dean Wentworth (2 episodes)

as Richard Guthrie

as Sir Thomas Boleyn (5 episodes), as Thomas Boleyn (1 episode)

as Dr. Clarkson (30 episodes)

as Cooke (1 episode)

as Lord Farrar

as Whig Member

as Narrator

as Admiral Sir William Winter

as Brian Gainsborough (1 episode)

as Narrator (19 episodes)

as Himself (2 episodes)

as Dr. Lyle Wexler

as John Rennie (1 episode)

as Mr. Owen (1 episode)

as Daniel Raeburn (1 episode)

as Doctor Livesey