Since we are discussing obscure science fiction films in reference to Star Trek (2009), then I suggest you rent "Silent Running" starring Bruce Dern. While many science fiction films show their age, this film holds up surprisingly well in storyline and special effects. When sci-fi fans who are well acquainted with the genre vote, they often chose this gem on their top ten lists.

Every cast member and many of the crew watched many if not all of the original 79 episodic "Star Trek" television series to prepare for their roles despite the admonishments in their interviews (according to producer J J Abrams).