What are some good tv shows similar to Fringe?

[The Richard Heads]

I just finished Fringe and now I'm at a bit of a stand still. I've already watched Lost and Dexter so those are out of the question. I'm open for any suggestions old or new but i'm seriously suffering from withdrawl.

 

[E.G. Emeritus]

Since Fringe stole their plots from every old sci-fi series and movie around, it shouldn't be too hard to find a substitute.