And of course gave the world this classic;
http://youtu.be/wRnSnfiUI54 (http://youtu.be/wRnSnfiUI54)
Seeing it in the cinema as a child was awesome and horrifying. I can still remember the men having the brain slug dropped into their helmets, and the things crawling into their ears! Ack! That memory stayed with me for years and years; the only other thing I remember is Khan yelling, 'Fire aft torpedoes!'