This show is excellently cast and written (thus far - only 2 episodes in). Seems like it will become difficult to keep a meaty enough storyline, but please don't end this show before its time. It's more like a movie than a TV show - and that's a good thing. Heroes is a big hit and no one's surprised at that (seeing as it's the only original television show idea in many years). But the Black Donnellys shows amazing potential. Give this one a solid shot.
Oh, and NBC - if you were wondering why about 4 million people tuned out for the second half it's because it was 10:30 at night, people were tired, and those rating boxes are put in the wrong peoples' houses. You know what I'm talking about...