The trailer for Mass Effect 3 begins with a narrator (whose voice sounds similar to that of English actor Sean Bean) proclaiming the death tolls of a catastrophic event. Peering out a window, we get a look at the devastation as numerous buildings and other sorts of structures have been completely decimated by an unknown force. What's interesting about all this is that the soldier (and presumable narrator) is hiding out in a clock tower--which is later revealed to be none other than Big Ben.