Catch 22 is referring to Jack and Ben. (Just my two cents) In the preview I just saw it showed Ben promising Jack “no one will get hurt”. I bet Jack has to make a "catch 22" decision by trusting Ben to do something to one of the Losties.

You guys stop with the time traveling self course correcting B/S. The producers already said Desmond did not go back in time and he can't change the outcome of anything. I know it makes a great theory but the producers shut it down a while back.

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