Poker After Dark took the format of a Winner Takes All Tournament the players merely started with T which was the same as the $ entry fee, I think there was one series produced which was a Cash Game, in this occasion, Phil IMO was incorrect, ettiquette was for Phil to muck his hand so Bellande could win the pot by having the last live hand and then muck behind, so I am with Bellande on this. What happened finally was correct, as it was a stalemate, Phil must then either muck his hand or show to make it a contested showdown, as he took the last aggressive action on that round.
As for asking to see a hand, that has gone nowadays, I as a TD would not honour any player's request to see a hand unless there was a question of collusion, illicit conduct or an improper starting hand.