The Fringe episode you've all been waiting for - the one that explains Peter's origins - will be airing on April 1 when Fringe returns from its mid-season hiatus.  FOX has released two sneak peeks, which we have posted below.  I've also included a short promo and you can also view a few promo photos we previously posted for the episode.

“FRINGE” SPRINGS FORWARD BY REVEALING THE PAST ON THURSDAY, APRIL 1, ON FOX

Second Season Resumes with Eight All-New and Uninterrupted Episodes

Walter flashes back to 1985 while explaining Peter’s otherworldly origins to Olivia. Also, Peter’s mother (guest star Orla Brady) is introduced, and details of the neighboring world reaffirms that there is more than one of everything in the all-new “Peter” episode of FRINGE airing Thursday, April 1 (9:00-10:00 PM ET/PT) on FOX. (FR-215) (TV-14)

Cast: Anna Torv as Olivia Dunham; Joshua Jackson as Peter Bishop; John Noble as Walter Bishop; Lance Reddick as Phillip Broyles; Blair Brown as Nina Sharp; Jasika Nicole as Astrid Farnsworth

Guest Cast: Quinn Lord as Young Peter; Jennie Blong as Carla; Orla Brady as Elizabeth Bishop; Michael Cerveris as September; Eugene Lipinski as December; Peter Woodward as August; James L. Watkins as General Tonks; Serge Houde as General Hames

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