I just wanted to point out to everyone saying that McAllister isn't dead:

-The house exploded right in front of Lisbon, she then went in immediately;

how do you expect McAllister would have had time to switch his body (they said they found a burnt corpse) ?

Also in an interview one of the producers said that there were originally meant to be a lot more body parts (they had the props) but they didn't make it on screen: hence the people dead in the explosion are exactly that; dead.