![](https://image.tmdb.org/t/p/original/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![](https://image.tmdb.org/t/p/w342/7zdiVD3tW8pQ3C3HieEvVOnWVmJ.jpg)
Extra Terror-estrial
A cute alien enlists the gang's help in building advanced machinery, but are the teens really helping the right creature?
![](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
Other episodes for this season
![Attack of the Killer Spuds](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Driven to Distraction](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Me! Me! Me!](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Invisible Archie](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Attack of the 50-ft Veronica](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![The Haunting of Riverdale](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Curse of the Mummy](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Fleas Release Me](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![The Jughead Incident](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Virtually Evil](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Zombies of Love](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Brain of Terror](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Twisted Youth](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Monster in the Night](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Mega-Mall of Horrors](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Compu-Terror](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Misfortune Hunters](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Ship of Ghouls](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Something Is Haunting Riverdale High](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Supreme Girl vs. Dr. Arachnid](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Reggie or Not](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![It Lives in the Sewers](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Dream Girl](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Green-Eyed Monster](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Cinemadness](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Beware of the Glob!](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![The Day the Earth Moved](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Dance of the Killer Bees](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Extra Terror-estrial](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![The Christmas Phantom](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Scarlet Night](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![I Was a Teenage Vampire](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Halloween of Horror](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Archie's Date with Fate](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Alternate Riverdales](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Teen Out of Time](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Invasion of the Cockroaches](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![The Incredible Shrinking Teens](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Little Chock'Lit Shoppe of Horrors](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
![Big Monster on Campus](https://image.tmdb.org/t/p/w300/vPaYmlPCafKmjAqgAtKvyIozgyB.jpg)
A cute alien enlists the gang's help in building advanced machinery, but are the teens really helping the right creature?