It is the 30th Century and the everlasting villain Brainiac has found a way to travel back in time. He returns to Smallville to destroy Clark Kent before he can become Superman. Three Legionnaires from the future travel back in time to help Clark fight Brainiac.
Guest Cast

Shelley Fabares
voices Martha Kent
Mike Farrell
voices Jonathan Kent
Kelly Schmidt
voices Lana Lang
Scott Menville
voices Kenny Braverman
Chad Lowe
voices Cosmic Boy / Rokk KrinnCast Appearances

Corey Burton
voices Brainiac
Jason Marsden
voices Young Clark KentEpisode Discussion
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