At first, the aliens appear friendly, but then they cling onto Tyler and Alejandro's faces and zap them. Duncan kills the alien attached to Tyler's face by punching it. Duncan only agrees to remove Alejandro's alien if he promises not to vote him off during the elimination ceremony. They manage to capture the alien after it gets off of Alejandro's face and zaps Owen. Team Chris Is Really Really Really Really Hot tries to bring the surviving alien to Chris, but Tyler, who is carrying the alien while Alejandro and Duncan carry an unconscious Owen, is too busy gloating about winning. He forgets about the landmines, and one of them explodes on his feet, sending him flying to Chris and injuring him in the process. The alien inside the box dies due to the impact of the fall. Team Amazon wins the challenge by bringing the alien's box to Chris, which happens when Courtney trips Gwen in an attempt to lose.The aliens reappear in Aftermath Aftermayhem when Blaineley brings them in as part of the "Total Drama World Tour second-chance challenge." In this episode, Blaineley refers to them as "Facehoggers." When it is Noah's turn, he lands on the Area 51 square and is tasked to dodge high-speed lasers without moving off the square he stands on. Once Noah steps off the square after being hit by a laser, the two aliens chase him and latch onto his face as a penalty for losing the challenge.
In Free Chili, the kids are accidentally led to believe that Owen's chili dog is actually an alien, when a walkie-talkie hidden inside it made it look as though it was talking. Later on it's revealed actual chili dog aliens are flying around the Earth.
In Invasion of the Booger Snatchers, the Daycare gets overtaken by green slug like aliens who infect humans by climbing up their noses and taking over their minds. Harold, Izzy, and Beth are the only ones remaining to fight off against the invasion when Chef and all the other kids become infected.
- The way the aliens attach themselves to the contestants' faces as well as Blaineley calling them "Facehoggers" is a reference to the Facehugger aliens from the Alien franchise.
- The aliens' rounded heads, pupil-less eyes, and thin limbs are very similar to the physical appearance of Grey aliens.
- Every contestant attacked by an alien was a member of Team Chris Is Really Really Really Really Hot.