Previously on Big Brother, Chelsie earned her way to Finale Night by becoming HoH, and her ally Makensy would join her by winning the final Veto. With the sole power to evict, Makensy was going to put Cam on the lam. But after Chelsie worked her magic, and Cam pledged his loyalty, Makensy said Rubyebye to Rubina. 

Now, with the final three set, Cam, Makensy, and Chelsie will look back at this wild season, and witness the insane, intimate, and inconceivable moments you didn't see. Plus, BB16 winner Derrick is back. How will his return impact Part I of the 3-part Final HoH competition which kicks off tonight? Find out right now on Big Brother!

It is Day 87 in the Big Brother House, and Rubina has been booted. Makensy says on Day 5, she never would have predicted she would make it to Day 90 (Finale Night). She evicted Rubina to remain loyal to Chelsie and Cam. Cam says the chameleon is still chameleonizing and he's up to get down with either of these two ladies, overdue for a win. Chelsie says it is phenomenal, a super-fan's dream true, and she even got Makensy to keep Cam in the game for her, so she's protected on all fronts.

The final three come downstairs to find a Surf and Turf dinner prepared for them, complete with gourmet desserts and champagne. Makensy toasts the other Houseguests no longer with them, but some were... A lot, completes Cam. They start with Angela, who Cam calls "a hoot". Flashback to Angela's Jennifer Coolidge impersonations. 

They then segue to Tucker's wild moments, with Quinn saying Tucker makes him feel normal. You can't write a character like that, Rubina says. He may act like a dog, Tucker says, but he's a pussycat in the corner. Kimo says he's an amoeba. You mean enigma, Quinn corrects. 

Cam is reminded of how Tucker would shake up the Veto meeting. No season had as many crazy Veto meetings as ours, Makensy recalls. Queue the flashbacks to the 11 times in a row that the Veto was used, including five times when the nominee was blindsided being saved. Special attention was given to the fight between Cedric and Tucker, who did not heed Cedric's warning to use the Veto on himself.

Next Makensy remembers her fellow Texan, Brooklyn, who was a bit of a conspiracy theorist. Flashback to her belief that the moon landing was fake. Quinn hates to break it to her but the earth is round. She asks where hamsters come from - where are the wild hamsters? Where does Bigfoot buy shoes? Is the moon made of cheese? These are just some of the questions Quinn remembers Brooklyn asking.

Chelsie says the only show better than Big Brother this summer was Young Cedric. Flashback to the "production meetings" where the Houseguests work-shopped their pitch to CBS for a new sitcom. They even acted out some scenes, like Mama Drama and Cedric Finds A Dead Body (an after-school special). Joe even wrote a theme song. Sadly, CBS never called back.

Chelsie shares with Cam and Makensy that Joseph pictured himself as the DR. Will of the season, but he was more a DR. No. Flashbacks to Joe praising his social game and throwing competitions, and the other Houseguests reacting poorly to his self-delusions of being a ringleader. Joe is no Will Kirby, Kimo laughs. I'm getting a mastermind edit, Joseph tells Big Brother.

The final three move on to how emotional the House was, leading to a parade of Houseguest DR obsessions with wet chairs, toenail clippings, Lisa's hands, Quinn's mustache, and impressions of other Houseguests. Of course, Angela's laughing turns to tears and so begins a slew of crying clips, leaving no tears unshed. The segment concludes with a montage of Angela weeping - I've never cried like this as an adult, she cried.

Makensy will miss the pranks in the House. Cam points out that she was the easiest one to get scared. It's time for a segment on all the times Rubina made other Houseguests jump, complete with slow-motion reactions and growls from the Upside Down. Cam then introduces when Rubina finally gets a taste of her own medicine as he lamely sneaks up behind her and taps her on the back.

Chelsie moves on from Makensy getting scared easily to tripping easily, describing her feet as her own worst enemy. How do you trip upstairs, Cam asks. We see clips of Kimo falling out of a chair (he blamed the earth moving), Makensy wobbling standing up, Cedric falling into the hot-tub, Kimo falling off the hammock, Rubina falling off a backyard cushion, and yes, Makensy tripping while bringing a full plate of food upstairs, shattering a plate and sending breakfast back to the kitchen. And she's mostly upset about getting coffee in her hair.

Makensy's next topic was Angela's snoring in JANKIE's World. Leah says that's where she draws the line. She decorates Angela's snoring body with JANKIE toys and rubber duckies, but when Angela suddenly rolls over, sending the toys tumbling, Leah goes running. Bad kids, Angela laughs, good-naturedly.

The worst part of JANKIE's World, Makensy recalls, was only being able to eat pizza and ice cream. If only they had vegetables, Chelsie agrees. Cam notes that you might not get what you want, but you can always go to the DR and request it. Cue the montage: Lisa wants a normal-sized broom, Quinn a disposable camera, Leah socks with grips. The list continues - cigarettes, diet coke, a new shaky-cup, superglue, cuticle cutters, bathroom tile scrub brush, the name of the kid who rides Toothless in How To Train Your Dragon (Hiccup Horrendous Haddock III), a trampoline, French fries, stuff from the farmer's market, Whole Foods chicken, Impossible Meat, real bacon, the list goes on.

Cam thanks Makensy for teaching them how to flirt. Makensy guesses she was in the first showmance of the season. Chelsie pointedly asks Makensy if she had real feelings for Cam, then tries to laugh it off as Cam says, say what?  Flashback to Matt and Makensy Moments. They shift to Tucker and Rubina's showmance, with Kimo, Joseph, and Quinn filling in the dialog as they watch the pair on the HoH Spy Screen outside on the balcony. 

They can hear the screams from the HoH room when Tucker takes Rubina into a warm embrace and mouthy kiss. Then he lifts her up onto his waste. Cat's out of the bag, he tells us in the DR. Quinn is so excited he strips off his clothes, jumping up and down in his black boxers. I won't have any friends after this game, he acknowledges.

Cam says the Houseguests were like a family, and even became a band. Flashback to JANKIE's World, when the Houseguests wrote and performed a Big Brother song all about their season, including a T'kor rap, Angela off-key, and Kimo, fixated on pickle-kissing Joe.

The final three feel they're making it this far is #iconic, but just as Cam is toasting his dogs in the Big Brother crib, there's a disturbance in the Living Room. The Houseguests rush in as Derrick from BB16 breaks through the static on the screen.

I don't have much time, he warns them, I'm back undercover. The government recruited him to take down AINSLI, but she's just too powerful. Oh no, Makensy says.  The only way to take her down is from the inside, Derrick continues, which means it's up to you. 

The final three are focused intently on the Living Room screen, understanding the fate of all humankind, not to mention their chance at $750k, could be riding on this message.

AINSLI made a critical mistake during the last Veto competition, Derrick explains, by giving you the passcode to access her system. So you're first mission is to get in and destroy her power source. I'll be in touch via communications she can't trace. 

Good luck, Derrick says before being cut off, the Human Race is counting on you.

The HGs pump themselves up to shut down AINSLI for good. The Big Brother basement has been transformed the inner workings of the AI processor, ringed with bots and with three chassis suspended from the ceiling. To the side, there's a ridiculously large and obvious power source switch.

The final three are transported in, and an OKidata Microline 182 dot-matrix-printer (I actually had one of those during my high school and college years) prints out a message from Derrick: 

Welcome to Part I of the final three-part Head of Household competition. The stakes could literally not be higher as the winner of tonight's competition will automatically advance to Part III on Finale Night, and more importantly, shut down AINSLI's power source. Here's your assignment:

The passcode you've secured has allowed you to enter AINSLI's system. AINSLI is trying to destroy the human race, so you need to fly these aerial assault bots and sever her power source. These aerial assault bots are incredibly advanced and very difficult to fly. 

To make matters worse, AINSLI's AI Army will be trying to take you down with their laser defense system. Only the last one hanging on will be able to complete this mission and shut down the power source. As a thank you for your service, you will be declared the winner of Part I of the Final HoH competition. 

The two Houseguests who do not complete the mission must face off against each other in HoH Part II. It's time to Sever The Source. We're counting on you. 

-- Derrick.

The final three climb into their Aerial Assault Bots, which have handlebars above their heads and shoe-wide footholds. There are attack claws on the top and laser cannons mounted, with a big red power light indicating the bots are powered up. Chelsie is in a pink flight suit, with Cam in green and Makensy in blue.

As the competition begins, the Aerial Assault Bots fly from their launch platform into the center of AINSLI's system over her CPU, powered by air jets, tilting downward to a 45-degree angle and moving in circles to face AINLSI's defensive threats.

Who will win the final three-part Head of Household competition and decide who to bring with them to the final two? And which Houseguest will the Jury of seven crown the winner of Big Brother 26? Plus, who did America choose as their favorite player? 

Find out on Sunday night at 9PM ET, live, on the 2-hour season finale of Big Brother!

Tonight's coverage of Big Brother, S26E38, was written by Fuskie.