He dies in Season 1. Locke has Boone do something dangerous -- cliimb a tree to look at a small plane that crashed there -- and Boone gets fatally hurt when the plane falls. Locke doesn't climb the tree himself because all of the sudden his legs seem to fail him. So, basically, Locke ignores the island warning him not to go up the tree (there were dreams earlier too) and gets Boone killed.
It was all very dramatic. Or boring. Or both.
I finally saw this, last night. I can totally understand how Locke misinterpreted the warnings, thanks to the way they wove the backstory with his bio parents into the episode.
Boone is now dead. I still like Shannon. The bit with Sawyer's glasses cracked me up (that might have been a previous episode, they all run together when I watch them on DVD).
I feel badly for Jin and Sun.
Claire's baby is finally here.
And? Now there's a whole planeload of heroin, just waiting for Charlie to happen on it. Too bad Jack didn't have some to ease Boone's passing.