Reggie's reckless behavior causes him to lose the title of Honorary Chief of Police to Archie, and to show him up, Reggie tries to prove that Sabrina is responsible for recent locker room vandalism.
Sabrina’s mirror-image cousin, Demeana, wreaks havoc upon Riverdale, and Reggie has a particularly unpleasant adventure. After banishing her to the fourth dimension, Sabrina wipes Reggie’s memory and asks him on a date.
Dilton attempts to build a translator for Fifi, the new French foreign exchange student, but a jealous Betty and Veronica sabotage the machinery.
Everywhere that Jughead goes, he’s steps behind his cousin Ace, who’s impersonating him and pulling pranks on the residents of Riverdale.
When the Groovie Goolies jot off to the Monster of the Year Awards, Sabrina babysits Hauntleroy, Ratso, Batso, and Hexter. She tries to clean up at Horrible Hall, and then takes the boys bowling and to the park. Everywhere they go, Hauntleroy appears to create pandemonium, when in fact, it's the other three boys tormenting him.
Dilton puts Q through a series of rigorous tests before taking him to Washington D.C. to compete in a science tournament. Q seems to be a shoo-in to win until a female robot emerges at the competition and steals his heart.
Wonders await the gang at the space center. It’s all fun and games, but the situation escalates when they accidentally blast off to the stars in a space station, where Reggie is abducted by chicken-like aliens.
Sabrina attempts to stay out of sight when Reggie and Moose get stranded at Horrible Hall. A storm has put her magic on the fritz, so the teenager is initially unable to fix their car. The boys spend the evening wandering through the castle, encountering a variety of Goolies and ghosts.
Reggie becomes jealous when everyone fawns over Carlos’s mural, which makes him the prime suspect when it’s vandalized.
On a field trip to the forest, Moose frightens Miss Grundy by dressing up as Bigfoot. When she doesn’t come to school the next day, Archie discovers she's moving and mistakenly assumes she’s quit. Thinking the gang is to blame, he attempts to intervene but worsens the situation.
Sabrina suggests that the Archies go on a picnic, not realizing that it’s the day when Miss Della and the other witches are having a convention in the Riverdale Woods. After failing to convince both parties to relocate their festivities, Sabrina tries to keep the Archie game safe from harm.
For the talent show, Betty, Veronica, and Ethel do a dance; Carlos shows off his frisbee skills; Moose and Reggie perform magic; Archie and Jughead perform a skit; and Sabrina merely spectates. After the show, the gang is swindled by two conmen who are masquerading as Hollywood agents.
Everyone gets bitten by the acting bug when Hollywood heartthrob Robert Blueford comes to town to shoot a movie. Reggie gets fed up with the actor hogging all of the attention, so he hires Blueford to star in the school film with the intention of embarrassing him.
When Sabrina and Moose swap bodies in the funhouse, Hilda and Zelda work feverishly to reverse the spell.
The witches don’t like what they hear when Mr. Weatherbee gives a lecture on "Superstitions and Other Nonsense," so they cast a spell on him to make everything he says come true. It starts out fairly harmlessly, but eventually, the witches lose their powers and everyone on earth is transformed into a bird.
At Crime Prevention Week, Reggie is inspired to open a detective agency, and he thinks “the power of positive thinking” is working in his favor - but it turns out that Sabrina’s magic has simply rubbed off on him. Things get spooky when the gang investigates a haunted house.
Sabrina brings a cauldron to Veronica's to cook chili in, not knowing that it’s cursed.
Aunt Hilda is appalled by the game show that Sabrina is watching, so she and Aunt Hilda head to the TV station and change all the programming to horror.
Sabrina accidentally turns Moose into the smartest man in the world. Suddenly, everyone wants him — especially a sinister pair of foreign thugs in trenchcoats.
To punish Reggie for meddling in Sabrina’s affairs, Aunt Hilda uses her magic on the Archies, making it seem as if Reggie is to blame.
When Miss Grundy borrows a chimp from the zoo, the Archies find themselves babysitting it over the weekend.
During Fire Prevention Week, the gang gets to visit the fire station, and Jughead’s pratfalls cause him to get expelled from school — twice!
Sabrina reverts Miss Grundy to a teenager and passes her off as Geraldine, a new student. Complications ensue when Reggie falls for her.
When Reggie learns that Jughead is auditioning Hot Dog for a TV commercial, he puts on a dog suit but runs into problems on the way to audition.
A rich golfer bets Mr. Weatherbee and the gang they can’t spend a million dollars within 24 hours. If they lose, the principal loses everything, so they try unloading cash in stocks, real estate, art, and other extravagances, but the money keeps multiplying.
Moose accidentally injures a bird, so Sabrina revives it and gives it the ability to speak. When Reggie gets wind of the situation, he decides to steal the bird, start an act, and make a ton of cash!
The gang starts a car wash. Dilton finds a way to make it more efficient utilizing computer-age technology, but things go wrong.
The kids are placed into jobs. Sabrina and Big Ethel work at a construction site; Reggie and Moose work as moving men; Betty and Veronica work at a beauty salon; Dilton and Q work at a restaurant; Archie mentions he works at a car wash. Later, everyone gets into the act at P.T. Boredom’s circus, where Jughead found employment.
While visiting the mediaeval fair, Carlos remarks that he doesn’t believe Merlin the magician was real, causing Sabrina to accidentally conjures him up.
After the gang agrees to paint Miss Grundy’s house, Reggie and Moose arrive four hours early in an effort to hog all the credit.
Lightning interference causes Dilton’s genealogy experiment to go awry, whisking Carlos’s quixotic ancestor, Don Carlos, away to the present.
Hot Dog digs up trouble for the Archies when he unearths a lamp containing Teenie, an old magic schoolmate of Sabrina's.
Ronnie and Clyde pursue Q through a toy shop.
When the gang ends up shipwrecked on Pirate’s Island, they find themselves contending with an alligator, parrot, bear, shark, and a pair of ghosts on a hunt for a fabled treasure.
Reggie is upset that his friends won't let him direct an animated film for Miss Grundy's class, so he sabotages the production, and then switches the film for his own cartoon.
The Archies run Carlos's family restaurant while his parents are away in Mexico.
After Reggie embarrasses Veronica at the school dance, Dilton offers to test their compatibility with his computer, but Reggie tries to sabotage the experiment. To get even, Dilton transforms his robot sidekick Q into android Miss Q Tee, who charms Reggie and accompanies him to the next dance.
Miss Della tries to get even with the Spellmans for forgetting her birthday, unaware that she's sabotaging her own surprise party.
An homage to “Archie's Funhouse” finds Dilton introducing his funhouse-in-a-box, which explodes into a series of rapid-fire gags.