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FOX gives plenty of previews to "Fringe" with the outing of its teaser called Fringe Frenzy and another promo which duration is long enough to be considered as a trailer. While the latter gives flashes of the first season's scenes, the former is a compilation of the actor's train of thoughts about the new season.

Several scoops about the season premiere have been unleashed in the past few weeks including the fact that Olivia returns from the parallel world in which she was last seen. Almost similar to the first season opener, the first episode of season 2 will begin with an accident, only this time it involves automobile instead of plane.

"Fringe" returns for its further explanation on September 17 with the episode "A New Day in the Old Town". The episode synopsis according to the press release is as follow: "The intensity accelerates as Season Two opens with Olivia's shocking return to this reality, and a determined Peter, unknowingly in a race against time with an ominous mobile force, pursues information about Olivia's blurred and perplexing visit to the alternate reality."

"Meanwhile, Walter reenters the lab to cook up a bit of fringe science, and of course, some custard for someone's birthday."

• Season 2 Teaser

• Season 2 Trailer