Jughead wins a trophy after watching a television marathon, unaware it's actually an alien potato capable of creating copies of its victims.
Veronica does nothing but whine and get others to do her work, so her father asks her to help clean up some artifacts for a new exhibit. Among them is a wish granting totem, which Veronica accidentally uses to turn all of Riverdale into duplicates of herself.
In the interest of his car, Archie buys a pair of fuzzy dice from a mysterious shop with no knowledge what the effect the dice will have on his car and what it could mean for his friends, who he has been ignoring.
Veronica is hit by Dilton's growth ray, turning her into a giant. However, she refuses to shrink back, thinking everybody's calling her fat.
Archie and Reggie are unhappy with Betty and Veronica's new muscle-bound interest. Reggie suggests that they use Dilton's new physique enhancing formula on themselves. Instead of the desired result, they both turn invisible!
The ghost of Riverdale's old librarian comes back to haunt the town. Jughead refuses to help having bad past experiences with her.
Archie procrastinates way too much, all to the point where he breaks into the Museum to get his report done, evoking a Pharaoh's curse.
Tired of Reggie's werewolf pranks, Archie allows the local sheriff to arrest him. However, it seems a real werewolf is attacking, with Reggie being the prime suspect.
A new mall opens up in Riverdale, with everyone but Jughead wanting to buy more and more. Now the more the teens buy, the less they realize their friends have become window mannequins.
A pair of government agents come to Riverdale, thinking Jughead is an alien.
Archie's constant bragging gets him and his friends in trouble in a new virtual reality game.
Veronica wants Archie to pay more attention to her, so she gets a hold of a magic potion. Now Archie won't leave her alone.
Moose needs a passing grade, so he uses Dilton's new experiment to boost his intelligence.
The faculty at Riverdale High turn adults into teenagers after drinking a new brand of bottled water. What's even stranger is that young Ms. Grundy is interested in Reggie!
After hurting himself, Archie reluctantly lets Reggie write the weird mysteries articles. However, an evil genie now possess the laptop Reggie uses, turning his fake stories real.
A monstrous man of incredible strength is making evening appearances in Riverdale. Archie's investigation leads him to uncover the side effects of a new energy drink being tested on unsuspecting citizens of Riverdale.
Betty loves to do good deeds without rewards. Which she quickly regrets when a pair of treasure hunters trick her into releasing a gargoyle.
A legendary medallion has possessed Reggie and made him obsessed with retrieving an underwater treasure guarded by ghouls determined to keep it there.
Midge, Dilton, and Ethel aren't exactly the most popular of kids, so no one thinks much of it when they go missing. However, when Archie is rendered invisible and untouchable by one of Dilton's inventions, he finds that he must work with them to stop the haywire machine from turning Riverdale into a ghost town!
Veronica loves to dish out gossip, no matter the cost. Which puts her and Archie in the middle of the Superheroine Supreme Girl's attempts at stopping her nemesis, Dr. Arachnid.
Reggie is abducted by aliens, who leave a much kinder clone in his place.
Archie and the gang go down into the sewers to find a mysterious monster. Only to find out, it's Jughead's pet alligator Peanut, mutated by a chemical waste spill.
Feeling brushed off, Archie falls in love with a girl he sees in his dreams. And she wants him to stay.
A new girl named Dorsa Finn arrives in town and shows interest in Archie. As it turns out, Dorsa is actually a local sea monster.
Reggie refuses to help others, which he quickly regrets when movie monsters fill the town.
Part of Dilton's new experiment is accidentally mixed in with the lunchroom's tapioca, creating a massive blob.
Archie refuses to continue his family traditions, until he learns it is the only thing preventing a giant worm from destroying Riverdale.
With prom around the corner, Big Ethel enlists Archie's help upon finding a swarm of humanoid bees.
Betty believes a cute alien is harmless and only wants to go home. But the others quickly realize, that isn't the case.
Moose tries to prove he's more than just muscle when a rival team's star player outshines him, only for Archie to discover he's a robot.
The department store's newest Santa Claus, Archie, is the only one in the mood to celebrate the holidays. But a phantom from an unbelievable source just might fix that.
Part 1 of 3: Veronica has a strange dream in which she isn't afraid of a vampire but is terrified of a redhaired girl she sees.
Part 2 of 3: Scarlet's master, Count Medlock, is unearthed and seeking to complete a prophecy that will bring the enternal night by transforming the Endor into a vampire like them.
Part 3 of 3: Archie and his friends gather for the Lodge's annual Halloween party, but menaces thought to be gone forever threaten to ruin the night.
Part 1 of 3: After using one of Dilton's two time machines, Archie finds himself living the same day over and over. Only to find out local thug Vinny stole the other, using it to commit crimes all over Riverdale. At the same time, Archie is offered to Europe on a scholarship.
Part 2 of 3: Vinny's future self returns and teams up with his younger self to take revenge on Archie. Being the only one unaffected by the time changes, Archie has to stop Vinny before he becomes ruler of Riverdale. With Reggie's continuing pranks causing both Betty and Veronica to hate him, Archie considers revenge.
Part 3 of 3: Believing no one person can make a difference, as well as feeling isolated from all his friends, Archie decides to take the Europe Scholarship. However, a mysterious somebody tells him to put on the time belt, which he'll need to stop Future Vinny from unleashing a T-Rex on Riverdale.
Pop Tate revitalizes his restaurant to cater to adults, but when all of the adults in the town sprout antennas and talk like robots, he finds that he might need the help of his former customers to save the town.
While visiting a mad scientist convention, Archie and Jughead are accidentally zapped inside a shrinking booth and have to struggle for survival while being two inches tall in Jughead's messy room.
Wanting to keep up with the new restaurant, Pop Tate allows Dilton to automate the Chock'Lit Shoppe. Unfortunately, the main processor used takes over the place.
Archie and the gang encounter Jughead's Neanderthal ancestor.
