Over the past week, FOX has been posting several 3 to 5 minute-long videos recapping the last three seasons of Fringe. The first video is a general recap of the series and it is probably the best explanation/summary of the show in general that I've ever seen anywhere. Mostly because it's actually coherent.
Click to view
If you've ever been curious about the series, have been looking for some sci-fi to watch, or want to know what the show's about, I'd suggest
checking these videos out. They're a great overview and relatively spoiler-free in the beginning, until the seventh or eighth video.
eta:
New promo, spoilers, lots of Lincoln, etc.