Dread-Yes, looking back it does seem as if the final quest was edited, but our quest panned out exactly as it was shown, with no "extra" rooms. The only thing we had to film again was our introduction in Treguard's chamber, as we were all, especially Danny, very nervous before the quest got going(The night before Danny was so nervous that we were considering putting another member of the team in as dungeoneer, but they told us that the team had to be as listed, and Dan was listed as Dungeoneer.) We filmed it about 5 times and so when Tom stuttered his name, it was left in as they didnt want to film it again!
Malefact-Like I say, we got calmer as the quest went on, with our start being quite slow. We were just determined to enjoy it, but not rush ourselves, hence our approach of thinking long and hard about everything (Including me hacking the other three off by debating about that fish for quite a while!)