Silent Running

After watching his fellow crewmembers having fun destroying the domes, Freeman Lowell (Bruce Dern) (disobeying the orders to jettison Earth's only remaining forests and return to the barren planet) kills the rest of the crew. He sends Dewey the robot drone, extra supplies and bright lights with the last remaining forest dome off into deep space. He then destroys the Valley Forge (and himself) rather than be rescued.
Thanks, Evil Ed!

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