After tonight, any of them are potential winners, and any of them apart from Caroline are potential quarter-final exits. It'll all be a different story this time tomorrow night, as the leaderboard is so close this week we'll finally see who really gets the public votes.
Frankie and Pixie had a bad week, so their potential to win will be shown very clearly by whether they can garner enough public votes to keep them out of the dance-off.
Mark had a decent week but a forgettable dance, and Simon had a potentially brilliant dance ruined by a mistake. They've both been in the dance-off before when they've had bad or forgettable dances, so it'll be interesting to see where they end up. Jake seems to be popular no matter what he does as he's consistently been outscored by all the other remaining contestants aside from Blackpool, yet never been in the dance-off, but there are only 3 points between top and bottom this time, so public vote is even more crucial than ever.
That said though, I think Caroline's safe, her AT seems to have gone down really well with most people (though I didn't rate it at all). I doubt she'll fall from top to dance-off given how tight it is behind her.