Watch a new sneak peek at Lost season five

A new video teaser has gone live for the upcoming fifth season of ABC's Lost, which debuts on Jan. 21 at 8 p.m. ET/PT. It's viewable after the jump.

The upcoming fifth season will put the show in "answer mode" and set it firmly on its trajectory to an expected 2010 end date, executive producers Damon Lindelof and Carlton Cuse told reporters on Friday in Universal City, Calif.

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