Wow, four episodes already!
So I'm writing this as the opening credits are rolling, and I'm just going go ahead and guess that the guys with traditional military sniper training are going to do best this week. Just seems like the nature of the challenge, and it's similar to some of the stalking training they do (loosely, but still similar enough.) We'll see how that guess works out in a half hour or so.
I'm going to stop giving things away a little for those who haven't seen the episode yet, so further stuff after the jump.