It's the 31st October, and Halloween, meaning everyone should be thinking about pumpkins, trick or treating, and fancy dress. Not us! Today is all about Interlagos and what's going to happen this weekend. Free Practice has never been more important, as we try to gain the slightest inkling of who's going to have the upper hand over the weekend.

If it rains, however, which is looking more and more likely (60% chance at the time of writing), we will probably not see an awful lot of action. Therefore, we will just have to make assumptions based on what we already know.

We know that Hamilton and McLaren are feeling quietly confident, but aware that no race weekend is entirely straight forward. Word on the street is that the team are bringing a new rear wing and other aerodynamic bits and pieces, even at this late stage of the game. It could be a risky business, as rear wings are integral to the performance of the car. However, I can't believe they would jump in without whole-heartedly believing it will make them faster, so that will be something to look out for.

Meanwhile, in the Ferrari camp, Massa says he's completely optimistic that he can win the title. I suppose you'd have to be, wouldn't you? We've made a lot of the fact that he knows his only job is to win, and the rest is up to fate. Räikkönen seems a little bit more realistic about the fact, saying that Massa will need a complete miracle to clinch the title from seven points behind. Presumably he'd prefer that lightning doesn't strike twice, and he remains the comeback king in championship showdowns.

Of course there are plenty of other drivers hoping to do well in Brazil. Alonso and Kovalainen have a great battle going on for 6th place in the championship, with Alonso just two points ahead. The Renault team have achieved their goals for this year, so Alonso can go out there and do what he does best. In the wet weather, we'll be keeping an eye on those at the back trying to move forward. Sutil tends to perform well in damp conditions and he'll be desperate for a point in this final race. Vettel scored his win in the rain, and Barrichello picked up a podium when the weather turned.

There's all that and more to look forward to, but first we have to get ourselves set up. We'll be in the Live Commenting Live... Thing, watching Live Timing and consuming ITV's online stream. The BBC promise to be covering FP1 on Sports Extra, and the action kicks off at mid-day GMT, so I'll see you in the comments.