Darmok

This is one of my faves... Picard is transported to a planet by an alien who seeks only to teach Picard to understand his strange language.

The plan succeeds but the alien is killed by a monster.

Picard arrives back on Enterprise, talks in the alien's language and is able to prevent a war.

It was worth his own life for the alien captain ( Dathon ) to teach Picard his language.

Wow.. just fucking WOW.

"I offer you a Vulcan prayer, Mr Suder. May your

death bring you the peace you never found in

life." - Tuvok.