I'm not quite sure what DR Ron Pulliam was thinking when he said LOST aired on Wednesday night. Obviously, it aired on Thursday.
spoiler space
Russeau has been with us off and on since Season 1 so *I* definitely cared that she was killed. Carl was of less concern, but I assume the point being made is that these two were being shot - not by "The Others" and not by "The Losties" but by one of the freighter people since Alex had to identify herself to them. The freighter people are supposed to kill everyone, at least so far as we know.
But, DR Jennifer, the point of them not showing us who fired was a little thing known as a CLIFFHANGER. Remember that until a few weeks ago, there was no indication that we were going to get ANY more LOST episodes this season, so the producers worked out to have a cliffhanger at the end of 8 episodes if that was all we were going to get this season. And even though we are to get 5 more episodes, they're a month away, so this was a nice shocking question mark to leave the audience with until the return of the show.