Resident Alien Season 3 Ending Explained

The third season of sci-fi comedy Resident Alien, created by Chris Sheridan (Family Guy), has descended upon us. The series follows an alien, Harry Vanderspeigle (Alan Tudyk), after he crash-lands in Patience, Colorado. Once on a mission to kill everyone on the planet, Harry changes his tune after connecting with the townsfolk — and now he’s determined to save them from another group of aliens hell-bent on destroying them. At the end of Season 3, Harry faces his most challenging mission yet. Does he manage to save the world with the help of his human friends? Read on to find out how it all goes down.

What happens in Resident Alien Season 3?

Harry’s now splitting time between working for General McAllister’s (Linda Hamilton) secret government project — planning a way to defeat the Grey aliens who are trying to take the planet — and serving as Patience’s town doctor, where he works alongside medical assistant Asta (Sara Tomko) and her best friend D’arcy (Alice Wetterlund). After discovering that the Greys are scheming to trigger a giant geyser eruption in Yellowstone National Park that’ll obliterate all life on Earth except for themselves, Harry builds a bomb powerful enough to stop them.

Over the course of the season, he also experiences love and heartbreak for the first time. After falling for a Blue Avian alien named Heather (Edi Patterson), he’s later betrayed when she joins the Greys and leaves the planet. Harry’s left devastated, but the experience helps him better understand the human heart.

Meanwhile, the town’s mayor, Ben (Levi Fiehler) and his wife, Kate (Meredith Garretson), realize that the disturbing visions they’ve been having are actually memories. Yes, the Greys have been abducting Kate for the past several months and Ben for practically his whole life. Now, the villainous aliens have even abducted the couple’s baby from Kate’s womb, which they’re keeping for research — unbeknownst to Kate, who mistakenly believes she had a false-positive pregnancy test. That is, until the Greys beam Kate up from Earth to observe her and the baby together. Though they erase Kate’s memories of the abduction and send her back, Harry recovers them when he hypnotizes her for intel on the Greys. Now, Kate’s dead set on getting her baby back at all costs.

Then there’s D’arcy. Throughout the season, she’s been down on herself about her life not panning out like she wanted. Years ago, she sustained a skiing injury that spoiled her chance at making it to the Olympics, and lately it’s been getting to her. D’arcy’s father, in the hospital after a heart attack, tells her he’s proud of her, that he believes she’ll do something great with her life. Later, she visits her ex, Elliot (Justin Rain), and tells him she knows exactly what that great thing will be. After saying goodbye (in case they never see each other again), she steals Harry’s bomb and drives to Yellowstone to blow up the Greys’ base.

How does Resident Alien Season 3 end?

The season finale opens with an ominous cold open, where a blue alien gets thrown into a prison cell alongside another of its kind. The pair is aboard the Greys’ mothership on the moon. The second alien then shape-shifts to reveal he’s actually a bug-faced Mantid (voiced by Clancy Brown), who promptly devours his cellmate’s head.

Meanwhile, D’arcy has a host of people following her to Yellowstone: Harry; Asta; Harry’s alien son, Bridget (Andrea Geones), and Grey-human hybrid Joseph (Enver Gjokaj). Joseph, who’s been trying all season to thwart Harry’s efforts on behalf of the Greys, switches sides after finding out that the Greys’ plan will kill him, too. So he uses a powerful alien tech device to turn the geyser’s underground water to sand, thwarting the Greys’ intentions.

While Joseph deploys his diversion, Harry, Asta, D’arcy, and Bridget are way up in the Greys’ mothership. Harry and Bridget split off to look for the bomb while D’arcy runs into Kate, who’s once again been abducted. Together, D’arcy and Kate find the baby, and — surprise — she’s not the only one. There are dozens of abducted babies aboard the mothership. The Greys catch Kate and send her back to Earth, but D’arcy manages to grab Kate’s baby and get away. She and Asta manage to get to an escape pod with Harry, who says that Bridget is dead. With the help of Robert (Paul Piaskowski), a human who was raised by Greys, the remaining crew heads home.

Once back on Earth, D’arcy heads to Ben and Kate’s to return the baby. Elsewhere, General McAllister steps through an alien portal to an unknown destination; Deputy Liv (Elizabeth Bowen) reunites with cyborg alien tracker, Peter Bach (Terry O’Quinn), as he searches for his son, Robert; and Sheriff Mike (Corey Reynolds) has his first alien encounter that results in him clobbering a Grey with his flashlight.

But since the group’s return, Harry hasn’t been acting like himself, unable to scarf down even a bite of pie, his favorite food. When Ben and Kate’s son, Max (Judah Prehn) — who has the ability to parse humans from aliens disguised as humans — goes to Harry’s house with his friend Sahar (Gracelyn Awad Rinke), he screams. It’s not Harry who opens the door, but a bug-faced Mantid alien who’s shape-shifted and escaped from the moon base’s prison. The real Harry is locked up there with Bridget. While the circumstances that led him to the Greys’ prison aren’t exactly clear yet, we know it’s not good. As the episode ends, Harry repeats what he always says in bad situations: “This is some bullshit!”

Is Resident Alien based on a book?

It’s based on the comic series by Peter Hogan and Steve Parkhouse.