Exclusive First Look at Fringe's Midseason Twist: Walter Unleashes a [Spoiler]!

It’s Hump Day this Friday on Fringe, as the Fox drama serves up the seventh episode of its 13-episode farewell run. To mark the occasion, Walter & Co. are bringing out the big guns in their quest to quash the Observers — and we’ve got an exclusive sneak peek.

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Already this season, the team dug up one oldie-but-goodie Fringe event — the skin-growing toxin from Season 1, Episode 14 — to help their cause. Per the official logline for this Friday’s hour, titled “Five-Twenty-Ten,” “As the fight for the future intensifies, a member of the Fringe team orchestrates a Fringe event of his own.”

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What exactly Walter is pulling the trigger on in this photo, I cannot say — though I can reveal that it will “greatly accelerate” their plan to take down Team Fedora. Any guesses? (Click photo to zoom.)