John Noble

It looks like Walter Bishop is in major trouble when Fringe returns for its final season.

Fringe Season 5 Video: The Observers arrive on earth

The latest trailer for the Fox series begins where the last one ended, depicting Peter (Joshua Jackson) and Olivia (Anna Torv) happily picnicking with their daughter Etta off to the side. That is until The Observers arrive. By the end of the 30-second spot, Walter (John Noble) is bloody and being told, "You are fighting a lot more than I would've thought possible."  

What does it mean? Watch below and share your theories in the comments!

Fringe returns Friday, Sept. 28 at 9/8c on Fox.