What the fuck is the 4400??

[Cheeba V2.0]

I assume some of you from the US will be able to tell me a little about it.
It's only just about to broadcast here for the first time, ysee...
I understand it's about alien abduction? But that's all

Fill me in.

[SamCostello]

Google gives us: http://www.usanetwork.com/series/the4400/flash.htm