Chris Larkin

as Charles Darwin

as Muller

as Chris Sear

as Nigel Jones

as Simon Coulter (4 episodes)

as Rab Butler

as Oliver Foxby (1 episode)

as John Wilcockson

as Danny Alexander

as Richard Brown (8 episodes)

as Dr Hurley (1 episode)

as Bernard Woolley (6 episodes)

as Roger Frobisher (1 episode)

as Dr. Mansell

as Anthony

as Sergeant Helm

as Phil

as RRW

as Atherton

as Atherton (2 episodes)

as Redfern

as Lynley (1 episode)

as Gerald Wright (1 episode)

as Captain Howard, Royal Marines

as Pete Farmer (1 episode)