Space:1999 Logo 'The Full Circle'
by Jesse Lasky Jnr.
and Pat Silver
1999 Cast

Alpha sends an Eagle on a survey mission to the planet Retha, but when the ship returns the crew are missing and the only occupant appears to be a dead caveman. Faced with a bizarre mystery, Commander Koenig and Doctor Russell lead a rescue team to the planet surface, only to disappear as well. Alan Carter is then attacked by cavemen, while Sandra is captured by the primitives and taken to their cave. A fight breaks out between the tribe’s chief and another caveman, who have both taken an interest in Sandra. But to Sandra’s horror, she suddenly realises that the chief and his mate are actually Koenig and Doctor Russell, somehow regressed to a primitive state…

Martin Landau (Commander John Koenig), Barbara Bain (Doctor Helena Russell), Barry Morse (Professor Victor Bergman), Prentis Hancock (Paul Morrow), Nick Tate (Captain Alan Carter), Zienia Merton (Sandra Benes), Clifton Jones (David Kano), Anton Phillips (Doctor Bob Mathias), Suzanne Roquette (Tanya Alexander), Oliver Cotton (Spearman), Sarah Bullen, Andrew Dempsey, Annie Lambert, Robert Philips, Michael Stevens (Main Mission Operatives), Tony Allyn (Security Guard), Chai Lee (Nurse), Alan Meacham (Caveman)

Directed by Bob Kellett
Produced by Sylvia Anderson
Series created by Gerry and Sylvia Anderson

UK (ATV Midlands):
December 11th, 1975

*Featuring Commander John Koenig, Doctor Helena Russell, Professor Victor Bergman, Paul Morrow, Captain Alan Carter, David Kano, Sandra Benes and Doctor Bob Mathias