Fringe‘s infamous 19th episode is almost here, and the promotional images from “Letters of Transit” might help clue us in as to what’s happening.

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The images released by Fox were also accompanied by short descriptions that might offer further clues: Walter, it seems, now has brain damage, gets an injection (is that Lost‘s Henry Ian Cusick in the shot?!) and help from an older Nina (why has she aged when Walter hasn’t?).

The episode takes place in the future, the year 2036 when the Fringe team and Observers engage in a “game-changing” battle. Past #19s have included the musical episode, “Brown Betty,” and last year’s cartoon, “Lysergic Acid Diethylamide,” so we know something special is in store.