I noticed tonight's episode is 1 hour, 10 minutes long - so it should be pretty tense.
I flicked through the final episode from series 1 as I couldn't remember the exact format. After the task, they had one round table banishment and then they moved to the firepit where they had to vote to continue banishing or to stop the game. If one person votes to carry on, they have to do so and then they vote to banish someone else. The game continues until there's a consensus (though I assume if it ever got down to 2, the game would automatically end at that point).
Obviously a traitor will want to end the game as early as possible knowing they'll take the money if they're still in. But Harry's so wily, I think he'd vote to carry on banishing if Andrew is still left - because then he looks faithful and he gets all the money rather than sharing it. If Andrew then goes, he'll obviously then reveal he's a traitor and I think the remaining players would vote to stop.
Jaz is definitely suspicious of Harry, but he has to be careful because if he's too vocal about that, Harry will probably turn it back on Jaz and try to get the rest of them to vote him out. It's so exciting.