Space: 1999
Season 1, Episode 15: The Full Circle
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When exploring a habitable planet, members of the Alphan survey party vanish without a trace. Are they the victims of an indigenous tribe of Stone Age humanoids? The mystery deepens when a dead caveman is found to have capped teeth. Others soon notice the primitive cave chief and his mate bear an uncanny resemblance to the missing John Koenig and Helena Russell.
All Episodes - Season 1
Episode 1
Breakaway
Episode 2
Force of Life
Episode 3
Collision Course
Episode 4
War Games
Episode 5
Death's Other Dominion
Episode 6
Voyager's Return
Episode 7
Alpha Child
Episode 8
Dragon's Domain
Episode 9
Mission of the Darians
Episode 10
Black Sun
Episode 11
Guardian of Piri
Episode 12
End of Eternity
Episode 13
Matter of Life and Death
Episode 14
Earthbound
Episode 15
The Full Circle
Episode 16
Another Time, Another Place
Episode 17
The Last Sunset
Episode 18
The Infernal Machine
Episode 19
Ring Around the Moon
Episode 20
Missing Link
Episode 21
Space Brain
Episode 22
The Troubled Spirit
Episode 23
The Testament of Arkadia
Episode 24
The Last Enemy