I'm way behind on my Fringe, but the promo material for season four makes a strong case for why I should catch up.  We posted the first four teasers in the "Where is Peter Bishop?" series last month.  Yesterday, Fox released the final entry---this time a full trailer.  The network still isn't quite ready to answer that question, since Joshua Jackson appears only in brief flashes.  But the season premieres next Friday, September 23, so hopefully the devout among you won't have to wait too long to find out.  Watch the trailer after the jump.I need to watch seasons two and three in full before I get to season four, but the Fringe recap "Past + Present + Future" makes skipping ahead awfully tempting.  John Noble narrates the 12-part series that promises to catch viewers up on anything they missed over the first three seasons to be ready for the new season.  The first installment is embedded below.  The others can be found on this playlist.