Any other shows like this (besides FlashForward)?

You might find it worthwhile to give Spooks and the remake of Survivors a try, and of course there's also Dr Who and Torchwood.

It's such a shame the BBC abandoned plans for a further series of Paradox, citing low ratings as an excuse. (Can't see why this should be a problem with a non-commercial braodcasting organisation.). They really should have given viewers some real closure at the end of the first series if there was any doubt about making a sequel.

I must get the DVD of Fringe - hope it will fill the gap in my life left by the end of Lost!

Just thought of a couple more suggestions: Life on Mars (the original BBC version) and its sequel Ashes to Ashes, these are both BBC shows. Also, ITV produced an interesting 5-parter last year called Collision, a drama which tracked the interconneced stories of a group of people all involved in a road traffic accident, with lots of cause-and-effect and what-if themes running through it, which might appeal if you enjoyed Paradox.

time cop tru calling 7days early edition

"Early Edition" is something like that but more light and with kinda fun.

I'm looking at all the suggestions others have made and would like to add Quantum Leap to the list. :)