Just watched the 'Candyman' episode, and I gotta say, it would be a monumental shame if this get's cancelled. I genuinenly jumped out my chair when the Candyman appeared behind the door in the teaser. This season is easily there best yet.
I think the problem for Fringe is that, both previous season's started so slow. It took them 10 episodes to find there feet and provide great episode after another. This season however, seem's to have hit the ground running, and really push the show into a greater boundary. I think the addition of another Universe has helped to keep each episode fresh and interesting, whilst still slowly moving the main mythology onwards. Everyone seems to have upped there game, from the wonderful teaser's at the start, to actor's playing multiple versions of themselves. Like I said before, it will be a great shame if this show is cancelled by Fox