All hail the Observers!

Fringe takes a trip into the future in Friday's episode (9/8c, Fox). Lest we forget, it's Episode 19 for the season, which traditionally means it will be chock-full of craziness (See: Last season's switch from live-action to animation in "Lysergic Acid Diethylmide").

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In "Letters of Transit," the future is not all it's cracked up to be since the Observers have officially taken over planet Earth, wiping out most of the human population. Similar to last season's finale, which ventured 15 years into the present, Friday's hour-long thrill ride will offer up a chance to see what life could be like if humans were at the bottom of the food chain, so to speak. To get acquainted with this version of the future, here are five things to expect:

1. In the year 2015 — eek, we better start building the resistance now! — the Observers took over Earth. It's now 2036 and things are looking grim, but a familiar face will be instrumental in helping the resistance.

2. The Fringe Division still exists, but their only job is to police the "Natives,"  a term used for the human survivors. Lost's Henry Ian Cusick and Georgina Haig will play members of that team.

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3. The true identity of Haig's character Etta has already sparked speculation, ranging from her being a disguised version of Olivia's (Anna Torv) niece Ella (whom we met when Fringe went to the future in Season 3) to possibly another family member. We'll just leave it that she has a connection to the Fringe team and let you chew on that.

4. Thanks to Peter's (Joshua Jackson) journey into September's (Michael Cerveris) mind earlier this season, we know that the Observers are a team of scientists who traveled back in time to witness their own creation. However, in Friday's episode we'll learn who they really are and what else they can do. 

5. What's a freaky and fun 19th episode without a surprise appearance? You really won't see this one coming.

Fringe airs Fridays at 9/8c on Fox.