Lost turns 100 tonight! Displayed here are images of the celebratory cake crafted for the cast and crew of Lost by the nice fellows from Ace of Cakes . As we have mentioned in the past, it's a real milestone for a TV show to reach 100 episodes. It means that it's likely been on the air for at least 5 seasons, and if a show sticks around for 5 seasons, generally that means it's something special (generally...). In honor of this milestone, we thought it'd be fitting to get some Lost discussion started! Mainly, which character possesses your favorite backstory? And...because it might be a different response, What is your favorite episode? The 100th episode of Lost , The Variable, airs tonight on ABC at 9PM.