“There is an entire world out there with no rhyme or reason.” You will hear these ominous words intoned on this Friday’s new episode of Fringe, which launches the sci-fi saga into its season 3 endgame — and sets the stage for season 4. Who’s doing the intoning? We could spoil it for you — or we could let you click on the video below and do the spoiling yourself. My guess is that you can easily guess, and in fact, talking about it further will only clarify the matter. So SPOILER ALERT! for my remaining prattle. Produced by Fox and presented here exclusively, the promo has the cast of Fringe touting the return of a certain iconic character — and teasing the fact that said character will be returning in a most curious fashion. In a word: Fascinating. The video awaits. And come back Friday for more intel on the episode, as well as my interview with exec producers Jeff Pinkner and J.H. Wyman about Fox’s (BRILLIANT!) decision to renew Fringe for another season.