Who are you? After sacrificing himself to save both worlds, Peter mysteriously returns to ours. But he has been forgotten - by Olivia, by Walter, by everyone. It's as if he never existed. At the same time, shape shifters controlled by an unknown master begin an onslaught of destruction, and now the two former enemy universes must cooperate to defy a common foe. Fringe's thrilling 22-episode fourth season continues the inspired series' synthesis of astounding phenomena, baffling secrets and dramatic, character-driven stories. And in this season, events may prove that the most powerful force in our universe - or theirs - is not a doomsday device, not a paranormal force, but human love.
All 'Fringe' seasons have been intriguing to say the least. The fourth season starts off strong and continues to maintain its pacing throughout. Highly recommended for series fans. For new viewers, this season is a confusing point to start watching the series as it's all about the payoff for all the running mythology plot threads and character arcs.
This is a doubt the best of the sci-fi genre to come out in a while. The characters are engaging and the specials effects, though limited are well done. I like it when a series has a arc and sticks to it. That being said it is said that its arc was only 5 years but there are times when it is good that a series knows when to wrap things up before it becomes stale.