DANIEL ROEBUCK (Dr. Leslie Arzt)
WHEN HE DIED Season 1, episode 24
HOW HE DIED Exploded outside the Black Rock while handling dynamite and explaining the temperamental nature of nitroglycerin.
To read what Daniel has to say about his death, pick up our collector's edition Lost issue
Image Credit: MICHAEL MULLER FOR EW
Salute the characters we've loved and ''Lost'' over the years -- Boone Carlyle, Charlotte Lewis, Juliet Burke, and more -- in photos you'll see only at EW!