This Friday, it all comes to an end — Walter Bishop is either going out history's greatest hero, or just a crazy science geek who failed to stop bald maniacs from the future from ruining everything. And Fox just released a two-minute trailer for the Fringe series finale, which plays to the show's strengths: horrific imagery, Olivia making a desperate journey into the unknown... and the stentorian, amazing voiceover of John Noble. If you've been avoiding the show lately during its admittedly wobbly final season, this trailer might just remind you why you love it.