Space: 1999
Season 1, Episode 21: Space Brain
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An Eagle and its crew are crushed to death by an enormous energy field in space. When one of Alpha's astronauts is possessed by the anomaly, he tells them the energy field is a living space brain, which responded to the 'threat' with antibodies Finding the Moon on a collision course with the Brain, the Alphans make plans to avoid the same fate as the Eagle.
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