Ok I'm going to refute a lot of really bad points here... sorry guys :-)
Eastgate is clearly playing with scared money.
That's just not true, he made a weak play without really thinking it through but Eastgate played nosebleeds before he won the Main Event and after a multi-million dollar payday, he's going to be way less scared than he was before.
Also, I doubt Tom would ever 3-bet TT preflop (with regards to your other point).
and he would have to put half a million dollars in the pot to find out if Dwan is bluffing or not.
Not likely. I doubt Tom tries to move Peter off what is clearly 2x or better on the river. With that said, he's clearly capable of trying it... I'm just not so sure he does. Maybe he does more often here than he would if this was online because it's on TV and would be infinitely sicker if it worked out.
I think Eastgate was more afraid of Barry, who b/c the flop (btw terrible call by him imo), then Dwan.
Eastgate doesn't care about Barry, if anything he is happier that Barry is in the pot because it should protect him from being bluffed by Tom (in actuality it probably opens him up to a bluff at a higher frequency - I've played a lot of hands w/ Tom and he likes to make seemingly suicidal plays like this more than anyone else, considering no one ever tries anything like this. Barry almost always has QQ-AA here (and sometimes, sometimes TT).
Barry's flop call is fine, if I were in his shoes I would have been confused by Peter's call. Assuming he doesn't have much more than 200k to start the hand I'd be shipping the turn after Eastgate folds (albeit reluctantly since Peter folded quick and I prob wouldn't think he'd quickly muck trips). I'm not really sure how I feel about how bad Barry's fold is in a vacuum, I am sure that Peter's fold is horrible, and I am really sure that Tom's play is straight up nasty.