I've never been so pissed off at the end of a "We're Alive" episode. Not so much that I didn't enjoy it, more like I was expecting a bit more resolution in regards to what happened to Lizzy and the other two. I guess I've been spoiled by having twenty full episodes to listen to (of which I got through in about a two day stretch) but these one - two week breaks between parts is brutal.

Anywho, looks like they aren't going anywhere soon and in regards to the helicopter being shot up, maybe there was a struggle for control of the helicopter at one point but then they were ambushed by the "zombies" or there are "zombies" that are now capable of wielding weapons (guns, etc.) or perhaps it was just a case of gunfire during the seemingly bloody ambush.

Even though this was used by the U.S. Army, if it's a large helicopter I'll take a guess (after some googling) that it might have been a Sikorsky S-61R or a Sikorsky MH-53. It sure looks damn big =P