Big Brother 18 dropped a whole of of twists on us this week. Not only did Victor return to the house after winning the first-ever Battle Back competition, but Julie Chen revealed there was a secret room that could give whoever discovered it a major power in the game.

So who won the sixth week in the Big Brother house? Check out our power rankings below. (For previous rankings: Week 5, Week 4,Week 3, Week 2, Week 1)

Natalie: Natalie is a whole lot smarter than she initially lets on. Though the broadcast show has yet to show it, she has a spot-on read on the dynamics in the house and knows how to adapt quickly to any situation. We'd love to see Nat get some power of her own soon, because we bet that — even more so than James — Nat wouldn't be afraid to take some big swings.
Grade: 7 (Season average: 6)

Victor: For someone who just returned to the game (and was never liked much to begin with), Victor is in an incredible place. He has zero heat on him and has managed to convince all the other houseguests that he's back with a clean slate and no grudges. It's pretty impressive given the fact that he had solidified his rep as a comp beast by winning three in a row during the Battle Back episode.
Grade: 6.5 (Season average: 3.8)

Da'Vonne: After being a target for the past two weeks, Day can rest easy for a bit. She put up one hell of a fight during the HOH comp and managed to get got some crucial info on Nicole in the process. And although she can only truly trust one person in the house (James), he's not a bad person to have by your side.
Grade: 5.5 (Season average: 6)

James: James won another endurance HOH and put up Frank and Bridgette. But unlike last year when he went against the house to nominate Clay and Shelli, he went with popular opinion this time rather than doing what's best for his own game. If he had really wanted to go after threats to himself and Nat, putting up Nicole, Corey or Paulie would have been a better move. However, it was a lot of fun to watch James recreate his betrayal of Shelli and Clay when he broke his word and put Frank and Bridge on the block. #Dealbreaker
Grade: 5.2 (Season average: 6.1)

Paul: Paul just can't seem to help himself sometimes. His reckless insistence of calling out Frank reminded us far too much of Week 1 Paul, and potentially put a target on his back. But Paul will prove his smarts in a major way in Thursday's episode, and Victor coming back puts another strong ally on his side.
Grade: 4.7 (Season average: 5.4)

Paulie: Paulie is far too comfortable in the house. With Tiffany gone, Paulie seems kind of aimless — as though he could flip on anyone at any minute. It's possible that his behavior, combined with his know-it-all attitude, could be his downfall if he doesn't get it together soon and find his one ride or die, like Derrick told him to.
Grade: 4.3 (Season average: 6.8)

Frank: Oh, Frank. Blowing up Nicole's spot during the HOH comp was a desperate move that of course blew back in your face. And Frank's refusal to campaign against Bridgette/saying he'd rather go home now than be stuck in jury makes us re-evaluate the type of player he is. (Although we can't blame him for not wanting to be stuck in jury with a bunch of people who hate him.) He does get major props for the casually cool way he handled Paul's ridiculous rant.
Grade: 4 (Season average: 6.8)

Michelle: Even when she was holding Bridgette's fate in her hands, POV winner Big Meech couldn't muster an ounce of kindness for the possible evictee. And since Frank is likely the one who will be sent packing, it would have been in Michelle's best interest to play nice with Bridgette just in case she becomes HOH in the future.
Grade: 3.7 (Season average: 4.6)

Corey: Corey hasn't done too much this week beyond snuggle up to Nicole. But that also means he hasn't done anything too stupid.
Grade: 3.5 (Season average: 5.3)

Zakiyah: As live-feeders know, Z is prone to jealous blowouts about Paulie getting too close with the other girls in the house. But for people who just watch the broadcast, Z is little more than decorative furniture. When was the last time she had a DR?
Grade: 3 (Season average: 5)

Bridgette: With her back against the wall, Bridgette continues to stand by Frank. Now is a time she should be campaigning for herself and trying to make alliances with people in case she stays. Instead, she'll likely have to fend for herself after he goes, which means, unless she wins HOH this week, she'll be out next.
Grade: 2.5 (Season average: 3.3)

Nicole: Nicole is not thinking straight. She's practically attached to Corey's hip, and her attempts to play both Frank and Day were an utter failure. We had high hopes for her when the the season started, but it's clear she's more into a boy yet again than the game.
Grade: 2 (Season average: 5.8)

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