Dopo aver sospettato che Percival stia per fare agire Archie, Betty e Jughead mettono in guardia i loro amici dalla sua potenziale minaccia per la città.

Per liberare la città di Riverdale dalla morsa di Percival, Archie, Jughead e Betty escogitano un piano per trasformare Archie in un eroe popolare moderno, compiendo una serie di imprese impossibili.

Dopo aver scoperto che il piano di Percival per risollevare Riverdale prevede la fine del Pop's, Tabitha cerca un modo per contrattaccare.

Dopo aver scoperto i piani di Percival per la città, Archie, Betty, Jughead e Tabitha escogitano un piano per estromettere l'attuale consiglio comunale e istituirne uno proprio.

La nuova fase del piano di Percival coglie di sorpresa Archie, Betty, Jughead, Veronica, Cheryl e Reggie, costringendoli ad affrontare i traumi del loro passato.

Archie si mette alla ricerca di un modo per diventare immune al palladio, la sua personale kryptonite, in modo da poter avere una chance di battere Percival. Betty chiede a Jughead di aiutarla a recuperare dei ricordi repressi di quando era bambina. Veronica fa i conti con una scoperta scioccante che cambia radicalmente il suo modo di interagire con le persone intorno a lei, mentre Cheryl si chiede se contattare o no una sua vecchia cotta d'infanzia.

Non essendo riuscita a far dichiarare il Pop's un luogo di interesse storico, Tabitha chiede ad Archie di aiutarla a salvare il locale da Percival. Betty si confida con Drake riguardo alla sua abilità di vedere l'aura malvagia delle persone.

Dopo aver saputo che Percival maltratta i suoi lavoratori, Archie e Tabitha elaborano un piano per proteggerli e salvarli dal controllo mentale dell'uomo. Jughead viene preso di mira dopo che Percival scopre cosa lui e Veronica hanno fatto a Regge. Betty riceve una notizia inaspettata riguardo a un momento buio del suo passato, mentre Toni e Fangs si trovano a un bivio.

Betty organizza una convention dedicata ai serial killer nel tentativo di catturare lo Smembratore una volta per tutte. Cheryl riceve una notizia riguardo a Toni e Fangs che la mette in crisi, mentre Archie e Tabitha cercano un modo per liberare gli operai dal giogo di Percival.

Mentre la squadra si riunisce per festeggiare un lieto evento che riguarda due di loro, delle strane piaghe bibliche cominciano ad abbattersi sulla città, minacciando di rovinare una giornata speciale.

Dopo che molti dei suoi amici soccombono per mano di Percival, Cheryl chiede aiuto a una collega strega, Sabrina Spellman. Nel frattempo, Percival dà un ultimatum a Reggie.

Archie e gli altri raccolgono informazioni su Percival per capire meglio da dove proviene, e quindi come sconfiggerlo. Ma quando il loro piano ha un esito inaspettato, i ragazzi sono costretti a pagare un prezzo terribile.

Quando il tentativo di Archie e Veronica di trattare con Percival non va come previsto, le forze del bene e del male si avviano allo scontro finale, il che porta a delle rivelazioni inaspettate.

Archie e gli altri ce la mettono tutta per salvare Riverdale dalla minaccia più grande che la città abbia mai affrontato.

After coming together to stop Bailey’s comet, the gang finds themselves transported back to a simpler time — Riverdale 1955. Archie attempts to impress the new girl Veronica. Toni, Tabitha and Betty take a stand against Principal Featherhead. Meanwhile, Jughead attempts to convince the gang that they're from the future.

Riverdale High's sock hop is around the corner and Archie has his sights set on taking Veronica (Camila Mendes) to the dance. Betty is confused when Kevin appears uninterested in taking things to the next level with her. Elsewhere, Jughead takes aim at Pep Comics, and Toni attempts to convince Cheryl to let Fangs perform at the sock hop.

After enlisting Archie's help, Cheryl's plan to fool her family spirals out of control. Jughead turns to Veronica for help after finding himself in some trouble, and Betty gives Kevin an ultimatum.

Principal Featherhead takes aim at the negative influence comic books have over kids, just as Jughead is tasked by Pep Comics to write four tales for a new issue.

At her wits end over Archie’s recent actions, Mary turns to Uncle Frank to get him back on track. Meanwhile, Betty asks Veronica for help understanding her sexuality. Elsewhere, Jughead takes action after he discovers plagiarism taking place at Pep Comics, and Cheryl and Toni’s budding attraction catches the attention of some River Vixens

Fearing that Betty is going down the wrong path, Alice forces her to join the after-school dance show, "American Grandstand." Meanwhile, Kevin is forced by Tom to join the Riverdale High basketball team, and Veronica finds herself cut off by her parents.

In order to keep Riverdale High's basketball legacy alive, Frank and Archie recruit a new player to the team - a quiet farm boy named Reggie Mantle. Tabitha's return to school inspires Toni to start a literary society for Riverdale's Black students. Alice forces Betty to join the River Vixens, and Kevin starts a new job at the Babylonium.

After devising a plan to bring in some money at the Babylonium, Veronica is surprised to learn somebody may be sabotaging her. Elsewhere, after beginning sessions with Dr. Werthers, Betty begins to question his motives.

Jughead and Tabitha team up to investigate a mystery involving Ray Bradbury. Cheryl asks Toni if she can attend an afterschool book club with her and other Black students. Betty and Veronica ask Archie and Reggie out on a double date, and Fangs prepares for his first big gig.

Veronica decides to host a ghost show after learning that Riverdale doesn't celebrate Halloween the way she's use to in LA. Betty makes the most out of her night out with Archie and Reggie, and Jughead makes a major discovery in a mystery brewing in Riverdale.

Archie and Reggie lean on each other as they prepare for their big basketball game against Stonewall Prep. Meanwhile, as they deal with ongoing issues with their parents, Betty and Veronica decide to throw a slumber party with Kevin and Clay.

Panic ensues after Archie and the gang learn that Mrs. Thornton is accused of being a communist. Cheryl's father Clifford forces her to out gay students at Riverdale High or risk losing power over the Vixens. Meanwhile, Hiram's surprise arrival to town is quickly met with suspicion by Veronica, and Jughead devises a plan to get around a boycott of comic books.

After Principal Featherhead agrees to let Kevin present him with an original musical written by him and Clay, Kevin learns the group might not be as into it as he had hoped. Elsewhere, musical rehearsals prompt Archie to question what he wants in life, while Betty and Veronica confront what's going on between them.

It's time for the town's annual Miss Teen Riverdale pageant and Betty, Veronica, Cheryl and Toni each have their own reasons for entering. However, when Alice doesn't allow Ethel to enter the pageant, the girls band together to make sure she has a fighting chance.

Veronica sets up a screening at the Babylonium after Julian gets his hands on a stag film and invites Archie, Reggie and the guys over for a watch party. Betty unexpectedly reunites with Polly and learns about her sister's new life in New York. Elsewhere, Jughead goes to war with Dr. Werthers over his censure of comic books.

Betty enlists help from Cheryl and Toni after deciding she's going to publish her own book. Veronica, Kevin and Clay host Hollywood movie star Josie McCoy, who is in town to screen her latest film. Finally, Archie's attempt to take his poetry to the next level doesn't go as planned.

As the gang gets swept up in Cold War paranoia, a new mystery brewing in Riverdale leads Jughead to suspect it may have ties to a string of suspicious murders in town. Archie reconsiders his future after Uncle Frank gives him a hard time about his poetry writing, and a shocking discovery involving her family shakes Betty to her core.

As the town's past secrets start to bubble to the surface, Jughead and the gang are forced to make a difficult decision that will change each of their lives forever.

Back in the present day and longing for her former life in Riverdale, 86-year-old Betty turns to a special friend to help her relive her last day of senior year with her friends as they were, their memories restored.