Our last full Jack-centric episode was the Season 3 finale, in which a suicidal Jack was flying across the globe trying to crash back on the island in the first flash forward. Of course, there was also that mysterious midget coffin - we still don't know for sure what that was about. This season, we saw Jack pop up in Hurley's flash forward... which was prior to the Season 3 finale, and in which Jack had not yet become obsessed with getting back to the island. He also appeared in Kate's flash forwards, lying about events on the island to make Kate look good at her trial - and also perpetuating some sort of cover-up story about the crash of Flight 815 and the survivors experiences.

If we are lucky, we might see Jack cry tonight. The official word from ABC is:

When Jack's health is seriously compromised, Kate and Juliet must learn to work together in order to save him; and something goes wrong as Sawyer, Claire, Aaron and Miles continue their trek away from Locke's camp and back to the beach. Guest starring are Ken Leung as Miles, Jeremy Davies as Daniel Faraday, Rebecca Mader as Charlotte, Jeff Fahey as Frank Lapidus, Sam Anderson as Bernard, L. Scott Caldwell as Rose and Kevin Durand as Keamy.

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