One of the biggest challenges, acting-wise, has been charting a character's growth through the length of an entire season. On stage or in film, I'm able to see a character's journey from beginning to end in one story, but on 'Lost,' every episode opens a new chapter for Jin. It's a lot like real life, actually. You wake up every morning and never quite know what's going to happen. All I can say is that so far, it's been a really great ride.