Big Brother featured Sam Smith winning the Power of Veto for the second time this season and choosing not to use it during Wednesday night's Season 21 broadcast on CBS.

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When Sam opted out of using the veto power at the Veto Meeting, his decision left Jessica Milagros and Kemi Faknule on the chopping block under Jack Matthews' Head of Household reign going into the next live eviction.

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The Big Brother broadcast began on Day 17, with Jack explaining he had nominated Kemi and Jessica for eviction because he figured they would target him if given the opportunity.

The girls also weren't part of his Gr8tful alliance, and he had heard from Isabella Wang they had been conspiring to form an all-female alliance.

Jessica said someone was feeding Jack inaccurate information, and both she and Kemi were desperate to win the Power of Veto.

Isabella admitted to Nicole Anthony she had told Jack about their Black Widow, all-female alliance, insisting she had her back and it was the best move to make on their behalf.

But Nicole thought it was a "stupid" move because now she might get backdoored, but Isabella told Nicole to trust her.

Isabella confessed she had a hard time keeping her mouth shut and it wasn't good for her game.

Jack then told Kemi that he respected her and couldn't stand to make the decision about nominations but he had to nominate her because she's a competitor and she scared him. Jack said he was terrified for his own safety in the house.

Jack tried to be all buddy-buddy with Kemi because he didn't want to blindside her due to the fact evicted houseguests this season stay in the house and resume their social game.

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As for Kemi, she put on a good face for Jack, but she didn't like him and planned to "slit his throat" as soon as possible. Kemi wanted him gone.

Nicole then warned Jessica that Bella had outed the four of them. Jessica appeared shocked.

Nicole acknowledged Jessica, herself and Kemi looked like "jackasses" while Bella came out smelling like a rose because of her conversation with Jack.

Jessica noted her "blood [was] boiling" and it was "disgusting" that Bella threw her under the bus like a "snake." Jessica was so disappointed because she was all about female empowerment in the house.

Nicole told Jessica that Isabella was "a wildcard" and they needed to proceed with caution around her.

David Alexander then provided his assessment of the house, given he had been quietly watching and observing everyone. David thought he had everybody figured out.

David called Jack and Jackson Michie the "Big Two" in the house and thought Holly Allen and Analyse Talvera were with them, plus Christie Murphy and Nick Maccarone.

David said Tommy Bracco was so likeable that no one would want to put him on the block and then Bella and Nick had something romantic blossoming in the house.

As for Cliff Hogg III, Kemi and Jessica, David assumed they had no idea what was going on in the house. And David also presumed Sam wasn't part of any alliance. Because of that fact, David hoped to work with Sam down the road.

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The cast then experienced an earthquake and everyone was scared and nervous.

Once things settled down, David and Ovi Kabir were instructed to put on their "Camp Comeback" uniforms.

Jessica then told Michie that rumors of her spearheading an all-female alliance was the "biggest bullsh-t" she had ever heard. Michie told her to be strong and said it'd break his heart to see her go.

Jessica felt blindsided, but Michie comforted her and suggested he might be able to win the Power of Veto and use it on her. Michie said he loved her and didn't want to see her cry or leave the house.

"Jessica is like my mom in the house, and I don't want to see her upset, but I don't want to cross any lines with Jack," Michie said in the Diary Room, adding that he didn't want to be picked for the Veto competition as a result so he wouldn't be stuck between a rock and a hard place.

It then became time to pick players for the PoV Competition.

In addition to the HoH Jack and the two nominees, Kemi and Jessica, the following players also got selected: Bella, Jackson -- who was Jessica's houseguest's choice -- and Sam.

Nicole was upset Jessica didn't pick her to play because she would have kept her safe. David also couldn't believe Jessica picked Jack's No. 1 ally to fight for her in the veto. He called it "a bad move."

As Jessica cried before the Veto Competition, Kemi spoke to the cameras in private about how a fire had been lit under her butt and everyone should be scared of her.

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Suddenly, the doorbell rang and Big Brother's Season 20 runner-up, Tyler Crispen, showed up to host the Power of Veto Competition. Analyse called Tyler her "dream man" and jokingly told Tyler's girlfriend Angela Rummans that she needed to "watch out."

For the Veto Competition, the participating houseguests were required to grab a poisonous frog from the pool and stack frogs one by one on a stump.

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The goal for each player was to stack as many frogs as possible without letting his or her "aqua clock" run out of water, which was leaking out water the entire time.

However, a play could only stack when water was in his or her aqua clock, and once the clock ran out, that person's score of stacked frogs would be complete. At 30 minutes, no one was able to refill their clock, so they'd have one last chance to stack frogs.

During the race, everyone's frogs kept falling, so it was anyone's game.

Although Michie was scared to win and have control of the veto, he wanted to win the five-night trip to Fiji, so he said he'd cross that bridge when he gets to it.

Sam locked in at 18 frogs, and Kemi was so close. But as Kemi was about to place her 19th frog on her stump, they all tumbled down.

Sam therefore won the PoV and the trip to Fiji, which he intended to share with his wife for their latest wedding anniversary.

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Jack hoped Sam would listen to what he wanted this week but acknowledged Sam was a bit of a wildcard.

Kathryn Dunn was then shown telling Sam she was afraid of him using the veto because then she might be put on the block, but Jessica tried to convince Sam to use it on her.

Kemi also asked Sam for help, saying she'd never put him up and would be a number for him going forward. Kemi thought she'd be the one going home if she stayed on the block.

Sam considered using his veto on Kemi because he liked her as a person and how straightforward she seemed to be.

Sam was then asked to go to the Diary Room, and a letter had informed him inside that his grandfather had passed away.

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Sam started crying because he had been very close to his grandfather, but the house rallied around him and attempted to comfort him.

Sam kept in mind his grandfather had advised him to play Big Brother to win the money for his wife and family -- so that's exactly what Sam was going to do, with a newfound "pep in [his] step."

At the subsequent Veto Meeting, Sam announced he had decided not to use the Power of Veto. Sam said he loved both girls on the chopping block but didn't want to create ripples in the Big Brother pool by going against the HoH.

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Jack was thrilled and said his plan was still on schedule for Gr8tful. Meanwhile, two of Nicole's best friends were on the block and so she had a tough decision to make.

Jessica planned to continue to rally for her safety, clear her name and build relationships, but Kemi was confident she wouldn't be going home no matter what.