Science vs. faith
Locke's flashback:
Jack let Desmond go because:
Why did Jack push the button?
The hatch:
Ana Lucia:
Will they really just sit in the hatch and keep pushing the button now?
What *will* happen if the button doesn't get pushed?
Is there really an infection on the island?
Next week - Jin speaks perfect English because:
Next week - Jack sees Kate fresh from the shower and ...