i watched it as well. that was unheard of, a guy making it to heads up in a decent tourney without showing one hand at the final table. the interesting part about the whole episode is that he started out at near the bottom in chips and at various times he went all-in against the large stacks with less than 10-20% of their chips and they still didn't call him. the first couple of times i'm sure they said, "he's playing tight, he has a hand." after the 4th time i cannot believe that not one of them thought, "eff it, ive got j6 suited there's no way this guy is pushing me around with his all-in bets." even X22's maniac a$$ with his "quack..quack" didn't call him.
with that said, we the viewers should keep in mind that they condense HOURS of play at that final table into 1.5 hours of content for a 2 hour show and we probably saw the only hands the dentist played over the course of the final table.
good fun. unfortunately watching those shows does little for my game since 1) i play low/mid limit hold-em versus the no-limit they play and 2) the players at my level are not good enough to recognize more advanced plays. they don't even get that a check raise generally means they should fold their middle pair.