Robert Daws

as Tony Block

as Peter Weiss

as Wyant Bridge (3 episodes)

as CC Lowsley (14 episodes)

as Michael Blore

as Charles Darwin

as Major Ted Huxby (1 episode)

as Professor Chessman

as Dr Choake (9 episodes)

as Robert Twyman (1 episode)

as John Green / Marcus Knight (1 episode)

as Self - Participant (1 episode)

as Ernie Rayner (3 episodes)

as Cannon John Jeffrey

as Simon Snell

as Jones

as Dr. Gordon Ormerod (87 episodes)

as Arthur

as Dick Thompson (3 episodes)

as Oscar Mansfield

as Sam (18 episodes)

as Peter Robson