'Fringe': Season four premiere in pictures
But there's also a few promotions in store. Astrid (Jasika Nicole) is a field agent in this strange new world, and remember the loveable 'geek' version of Lincoln (Seth Gabel) from the original universe? He's back and is now a full-time member of the Fringe team.
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Take a look at some images from the Fringe season premiere below: