Consider yourself warned, Fringe fans: this Friday's "The Bullet That Saved the World" will alter the situation for the team going forward.

Last month, TV Fanatic visited the Fringe set in Vancouver (trip provided by Warner Bros. TV) to interview the cast and Joshua Jackson tipped us off that something big was going to happen to Peter in Episode 4, with John Noble providing further insight into a reunion that takes place.

Spoiler warning: They don't reveal any specific plot points, but if you don't want to know anything about the episode, don't watch the following trailer or read any comments.

If the preview is any indication, Peter looks to be knocked out or possibly even dead. This is Fringe, so anything is possible. Heck, Olivia's been shot in the head twice and still around.

Jackson revealed the format of the season with hints about Friday's episode:

"Joel [Wyman] has talked to [the cast] ... about treating this season as sort of a three-act show. So [episodes] one through four are our first act. Then something big happens at the end of four, which launches us into the ... second piece.

"Which takes one of our characters into a direction that people will probably be pretty excited about but is not good for that character. And then what is discovered in here is the laying in of the end-game for Fringe."

When asked about Peter's greatest challenge in the season, Jackson responded: "You’ll have to ask me again after you see episode four, adding: "There’s pretty major revolutions through this three-act play that we’re doing, but for him there’s a pretty major shift that comes after four ... Dun dun dun...."

Between Jackson's comments and the "The Bullet That Saved the World" trailer, I'm quite nervous to watch this Friday. One potential positive is that Broyles returns. Noble teased the reunion between Broyles and his former Fringe team:

"That was very touching. Particularly for Olivia and Broyles, because Broyles has aged, and the rest of us have stayed as we were. So it was quite touching. Not knowing which side he's on or who he is working for, and he doesn't know himself where his loyalties lie."

Do you have any guesses as to what will happen on "The Bullet That Saved the World?" Are you as nervous about it as I am? 

Make sure to stop back here as soon as the episode ends to read Carissa's Fringe review and discuss what happened.

And check out the trailer titled "Resist."

Carla Day is a staff writer for TV Fanatic. Follow her on Twitter and on Google+.