The next episode of Survivor: Blood vs. Water is sure to feature another power struggle as the castaways battle to get into the final three.

Only five Survivors are left in the game (while three are still in the running on Redemption Island), and the finale is just a few days away. At this point, Gervase Peterson and Tyson Apostol are a tight alliance, with Monica Culpepper as their third. Meanwhile, Ciera Eastin has switched sides and is now working with Hayden Moss.

CBS released a preview of Wednesday night's episode of Survivor, featuring a desperate Ciera trying to lobby Monica to switch to her side. The clip shows Monica realizing that she is Gervase and Tyson's "puppy dog" and contemplating switching to Ciera and Hayden's side.

If Monica becomes the swing vote and switches sides, it could cause trouble for Tyson and possibly Gervase. However, no one else knows that Tyson is in possession of the Hidden Immunity Idol, which means that if he gets votes at Tribal Council after playing the idol, he will be safe.

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If Tyson catches wind that Monica has flipped, he may create a plan with Gervase to vote Monica out. They may also vote Ciera out for switching sides at the latest Tribal Council. It's also entirely possible that they vote out Hayden since he's the least likely to come to their side and work with them.

Either way, no one is safe at Tribal Council as the final five Survivors compete for a shot at the $1 million.

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Survivor: Blood vs. Water airs its next episode on Wednesday at 8 p.m. on CBS and will conclude on Sunday, Dec. 15 at 8 p.m.

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