Looks like Eureka is taking a trip to the dark side this year, which is fine by me. It should make things much more interesting!
Well, last season's finale was kinda dark. I haven't watched the new ep yet (tonight I will), but I've been idly wandering if our two time travelers from the alternate time line use their foreknowledge or do things start diverging too quickly.
Henry's story arc looks like it's going to be really interesting. I definitely liked the season 2 opener.
***Spoilerish***
I was thinking that Henry was starting the process where four years from now he'll time travel back to stop Kim's death again (or maybe sooner; he's got the knowledge already, the tech may take time though), re-creating the whole paradox mess.