Big Brother featured the Six Shooters alliance blowing up and Jessica Milagros winning the Head of Household competition, resulting in Jackson Michie and Jack Matthews on the chopping block during Sunday night's Season 21 episode on CBS.

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Jessica nominated Michie and Jack for eviction because she hadn't been involved in the drama in the house and a lot of things came to light, with the two men being the common denominator.

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The Big Brother broadcast began where Thursday night's live eviction episode had left off, with Kathryn Dunn being declared safe and the houseguests competing in the next Head of Household competition.

Footage then flashed back to the demise of the Six Shooter's alliance, with Jackson telling Jack it made sense Christie Murphy and Tommy Bracco were going after them. Michie also revealed Kat and Holly Allen had been friends outside of the house before the game even commenced.

Jack, however, trusted Christie and Tommy more than he did Michie, so he informed the pair of Michie's conspiring. Jack promised Tommy he was loyal to him and shared the news of how Kat and Holly had known each other before the game.

Tommy said having couples in the game were bad enough, but to have a trio in jury -- Michie, Holly and Kat -- would be terrible. Tommy therefore wanted Kat gone as soon as possible and informed Christie of what Michie had said.

Jack, Christie and Tommy discussed pulling Analyse Talavera, Nick Maccarone and Sam Smith in with them to flip the house and take out Kat.

Tommy wanted to break up Kat's trio just like the house had to break up Nick, Bella and Sam.

Holly overheard some of the chatter and warned Michie their allies were flipping. Holly confronted Tommy, who denied the house was flipping, and then Michie broached the topic with Jack.

"There's no reason to flip," Jack told Michie.

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Two hours before the live eviction in which Sam was sent packing, Tommy admitted to Holly that he didn't feel safe with the Six Shooters anymore and the alliance was clearly crumbling. Tommy also told Holly that Michie had told Jack about her connection to Kat.

Holly felt disrespected, and so the group of six gathered and then things blew up. Christie accused Michie of having an issue with her and wanting her out, and then the entire house heard there was an alliance of six.

Cliff Hogg, Nick, Jessica and Nicole Anthony -- who were planning to stick together -- were thrilled to hear the "heavenly music" of the six fighting.

Christie accused Holly of having a Final 3 with Michie and Kat, and then Michie discovered Jack had leaked information he had told him in confidence. Michie felt totally betrayed and burned by Jack, who then slammed the door after Michie left the room.

"Glad I could f-cking trust you, Jack!" Michie yelled.

Kat announced she had volunteered herself to be a pawn and there absolutely was no trio, so she was terrified to be evicted.

"Jackson is why everyone thinks [Kat and Holly] know each other," Christie said. "Jackson is a snake."

Jessica was upset about the idea of Kat going home because they were close and she felt "powerless."

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Michie said Jack had made it pretty clear he chose Christie over himself, and Christie verified there no longer was "a six" in this game.

Jack and Michie then had it out, with Jack saying he couldn't possibly send two friends who knew each other before the game to the jury. But Michie said he had presented such information as speculation, not fact.

Christie then gathered votes for Kat to stay, and Sam ended up being evicted from the house.

Footage of the Head of Household competition then resumed, and the advertisement-themed race came down to Jessica vs. Kat. And in the end, Jessica came into power.

"I went from banishment to being on the block twice to being HoH!... You can't make this stuff up guys!" Jessica bragged.

Christie then accused Michie of trying to "bury" her in the game, and she told Tommy, Holly and Jack she had no intention of fighting to keep the six together. But Holly still trusted Jack, Tommy and Analyse.

Holly vented about how Michie believed Jack was his boy but he shouldn't have trusted him. Kat called Michie "stupid," and although Holly had sincere and strong feelings for Michie, she planned to continue the game with Kat as her No. 1 and ride or die.

Kat wanted Michie out of the game, and Holly promised a guy wouldn't come between them.

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Christie, Tommy, Analyse and Jack were "dead" to Kat at this point in the game, and then she was shown talking to Jessica and her allies about whom to nominate for eviction.

Jessica, as the new HoH, hoped to get rid of "a very powerful player" by targeting Michie and Jack. Jessica wanted to see everyone's true colors and watch her enemies in the game throw each other under the bus.

Jessica was taking her power back, and then it became time for the Nomination Ceremony.

Following his nomination, Michie didn't plan on leaving the game with his tail between his legs, and Jack was upset and cried in a confessional about having made the wrong choice in betraying a friend.

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Meanwhile, Nicole had "no fear" about "the bottom-feeders" going after the "alphas."

Big Brother's next episode will air Wednesday, August 7 at 9PM ET/PT on CBS.

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