The finale was good but should really have come 5 episodes earlier... seems like the entire virus storyline was just filler material, as it has no effect on the rest of the story.
And it was rather boring, the "bad" guys repeating their evil plans every time the camera is on them (in case we have forgotten?)...
Seems like a few recent SciFi series have fallen into that trap. They try to stretch the story in S01, and it ends up so bad that everyone's tuning out. The only reason I keep watching is that I am stubborn once I am into something - but I was as annoyed with it as anyone.
Other examples: Caprica: Great first 5 episodes, then horrific lull, then a cool finale. Too late, everyone's long gone. V. Pretty good, then turned boring. Blood skies at the end of S01, in S02 those were really nothing to worry about, just kidding so to speak. WTF. And now The Event, awesome edge-of-the-seats start, then 10 (?) filler episodes where nothing of consequence happens...
**** SPOILERS FOLLOW *****
Anyway - the Event. I liked how Walker in the end talked Sophia out of releasing the virus - that was cool. The special ops which suddenly are super-duper competent and stop 2 attacks all on their own - highly questionable!
BTW they yell "freeze" because they can't really be sure those are the bad guys in that moment, and they can hardly run around shooting up random people. So that I find believable.
The whole planet tunneling in - very cool. Though at first I thought... scratch that... was hoping that that's a Death Star.