17. ' Monty Python and the Holy Grail'

Nerds didn't have much to cling to in 1975.  Star Trek was a long-cancelled TV show, there was no Star Wars and video games were limited to rudimentary things like Pong.  Dungeons and Dragons hadn't even caught on.  Thankfully, 1975 was the year that Monty Python and the Holy Grail came out.  A brave generation of early nerds clung to it like a life raft, watching it again and again.  They also found ways to work the quotes into daily conversation, almost forming a second language that was quite foreign to the mass culture.  Nerds now rule the world, and Monty Python and the Holy Grail is pretty much their official comedy.