'Fringe' Season 5 Promo: Walter Gets Beaten Up (Video)

The anticipated final season begins Sept. 28.

Let the Fringe countdown begin.

A new season five promo has surfaced on the web for Fox's cult favorite -- and the 30-second teaser is a doozy. A bloody Walter (John Noble) takes center stage, with a happy Peter (Joshua Jackson) and Olivia (Anna Torv) picnicking like any couple would.

But the sight of Walter bloodied and beaten is unsettling. It seems as though the mad scientist is being held against his will by an Observer, so how exactly does he end up in that predicament?

Watch the latest promo below:

Fringe returns for its final season 9 p.m. Sept. 28 on Fox.

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