Primer is a 2004 American science fiction drama film about the accidental discovery of a means of time travel. Primer is of note for its extremely low budget, experimental plot structure, philosophical implications, and complex technical dialogue.
Directed by Shane Carruth. With Shane Carruth, David Sullivan, Casey Gooden, Anand Upadhyaya. Four friends/fledgling entrepreneurs, knowing that there's something bigger and more innovative than the different error-checking devices they've built, wrestle over their new invention.