Visitor from Mars

Plot
The episode opens up with Team Victory in first class. They are excited that they won, but more excited because Team Boss has had to eliminate three players in a row. Kacvinsky is analyzing the game, saying that if Team Boss loses again, he thinks that Catherine will be the one eliminated. Nathan officially asks out Lizzie after they have been a thing for a long time, and she accepts. Everyone in Team Victory claps, except Cooper who rolls his eyes. Channing runs over and hugs her best friend, congratulating her, but is secretly upset given she and Nathan have a rocky past, with Nathan being kind of mean.

Channing (CONF): I'm happy for Elizabeth, but...I just hope this doesn't screw up my game

Back in economy class, the relationships are more annoying than cute. Alli and Nathanael have gone to just making out and not paying attention to anyone. Caelan is wary, because JP and Catherine like each other, which basically means their allied within his alliance. Team Firecrotch is also sitting in economy as well, talking about how lucky they are that they haven't had an elimination for three challenges. Ashton has been easier on her team's seeming inability to win because of a romance of her own. She sneaks to first class to see Sam, and Liz catches her. Liz, angered, scolds Ashton for seeing someone from a different team, especially after giving everyone such a hard time for not focusing on the game. Ashton is about to respond when Evan gasps, and points at a small UFO floating outside the window. It turns out to be a fake one remote controlled by Chef. The contestants then land outside of Area 51.

The musical chime rings overhead, and the contestants sing E.T.. Chris announces the challenge will be to find a working alien artifact in the Area 51 warehouse. First though, they will; have to sneak into the warehouse. Also, if anyone gets caught by Mama Alien (Chef), then they are out. Also if they are captured by the government they are out and might run into legal issues. Chris explains that since there have been eleven eliminations, and there are only forty players remaining, things are going to get more intense. He yells go and the contestants all run along their routes into Area 51.

Immediately Chef begins stalking Team Boss, eliminating Alli and Nathanael, as they were too busy making out to realize that a challenge had begun. All three teams end up on three different sides of Area 51, with a high electric fence surrounding it. Zack comes up with the idea to dig under it, and Team Victory begins digging under the fence. Connor finds a way to disable the electric fence in their area, and Team Firecrotch begins climbing over it. Team Boss is stuck, and doesn't know what to do. Suddenly, Chef comes up behind them, shoots Alex, and starts running towards where Team Firecrotch is climbing over the fence. As Team Victory is digging under, a tube appears out of nowhere, and Zack and Nupur are sucked into it. Team Victory gasps, but Caroline tells them Nupur and Zack are fine and they have to continue without them. Team Boss figures out that part of their fence's electricity was cut thanks to Connor, and begin climbing over there.

All the teams arrive at the big black warehouse, where the alien artifacts are stored, at the same time. Chef is shown lurking behind Jacob and Riefy, still in a fight about their past relationship. He shoots both of them out. Colin, still sad over Elizabeth's elimination, goes to investigate what looks like it could be a working alien artifact, but he sighs when it isn't functioning. Chef hears the sigh and comes and eliminates him. Rachel finds something that is flashing and blinking, and puts it in her shirt to hide it, thinking it could be actually working. As Joseph and Serena are walking, they see a pod, and a Joseph clone comes out. Confused, Serena pokes the Joseph clone, and it explodes. They are both covered in goo, and Serena screams, setting off an alarm in the warehouse. All the remaining contestants look up, as the warehouse flashes red and a low continuous siren blares overhead.

The contestants still in the challenge look panicked, and then suddenly, troopers wearing all black swarm in from every door, eight of them carrying a cage with Zack and Nupur inside. All the remaining contestants (and Chef) are thrown inside, and brought outside of Area 51. The contestants and Chef are dumped out of the cage in front of a disappointed Chris alongside Alli, Nathanael, Alex, Jacob, Riefy and Colin. Chris said Team Boss loses since Serena set off the alarm. This angers the Team Boss members. Chris also says, since none of the other teams completed the challenge there will be no elimination but no first class. Then, Rachel pulls the working artifact out of her shirt, and a surprised Chris says Team Victory wins. This angers Caelan so greatly he blows up at Rachel. His team looks on scared, except for Alli and Nathanael who are still making out in the eliminated contestants zone.

At dinner, the members of Team Boss are fighting over who to eliminate. It is revealed that there is a mole in Marisa's alliance that is feeding info to Caelan, and him aware of everyone involved. That is how Caelan knew to eliminate Elizabeth back at the Grand Canyon. With this knowledge, he decides to throw Nathanael and Alli under the bus. He states since they are always making out, one of them needs to go so the other can focus. Marisa, despite them being in her alliance, actually agrees. Another faction of people though, want to go against their alliance and vote out Serena, for costing them the challenge, or Caelan, for blowing up at Rachel. The names Alli, Nathanael, Serena and Caelan were all continuously being thrown around.

The barfbags of the night are handed out to Joseph, Andy, Jen, Catherine, Marisa, Kalee, JP and Alex. Chris says all of them received no votes. The next barfbag goes to Caelan, then Serena. The bottom two are Alli and Nathanael, and the last barfbag goes to...

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..............Nathanael.

It is revealed a lot of contestants believed Nathanael would be more helpful in challenges, and would handle Alli being eliminated better than Alli would handle Nathanael being eliminated. Alli and Nathanael kiss one last time and Alli jumps off the plane sadly.