" The soundtrack songs are performed by Joan Baez and the film score was composed by Peter Schickele. Spoiler warning: Plot or ending details follow . When orders come from Earth to jettison the domes that contain the plants, blow each of them up via nuclear explosions and return, Freeman Lowell decides it is his mission to save the plants on his ship, the "Valley Forge. " Each ship carries six domes. When one of his crewmates comes to set a bomb in Lowell's forest, Lowell strangles him with the handle of his shovel. In the struggle Lowell's right leg is injured. He then traps the other two crewmates in one of the domes that is about to be jettisoned, and they are killed when Lowell releases the dome and blows it up. America Race Walking Athletes Lowell then overrides the programming of the service drones so they can perform surgery on his leg, and renames them Huey, Dewey and Louie. They fly through the rings of Saturn. "