The Plan was both revealed and ruined on Friday's penultimate episode of Fringe, leaving fans more anxious than ever for the upcoming two-hour finale.

How will the epic journey come to an end? With the ultimate sacrifice by Walter, as teased in the following official promo and this interview with John Noble?

The Fox synopsis for "An Enemy of Fate" hypes one "final and extraordinary" battle between Peter, Olivia, Walter, Astrid, Broyles and The Observers. Who will come out on top and at what cost?

Watch and prepare now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.