Episode #1: "Chapter One: The River's Edge"
January 26, 2017
During an eventful summer, which includes the tragic death of quarterback Jason Blossom on the Fourth of July, Archie Andrews discovers his passion for music. He soon begins his sophomore year, and expresses his love for music to Betty Cooper, the sweet girl-next-door who is harboring her own secret—her feelings for Archie. Meanwhile, Veronica Lodge, the beautiful daughter of a millionaire facing embezzlement charges, arrives in town, instantly capturing Archie’s affections. Despite the fact that a love triangle is developing, Betty and Veronica become fast friends, united when Veronica stands up against the condescending captain of the cheerleading squad, Cheryl Blossom, who may be hiding a secret concerning her brother’s death. Archie’s former best friend, Jughead Jones, begins to write a novel retelling the events of the summer, including what happened between him and Archie. Kevin Keller and Moose Mason stumble across Jason's body by the lake.
#2 "Chapter Two: A Touch of Evil" - Feb. 2, 2017
Veronica's kiss with Archie strains his relationship with both girls, while Miss Grundy insists that he not reveal that the two of them heard the gunshot that may have killed Jason since it would also expose their secret affair. Kevin, disturbed by the discovery of Jason's body, refuses to acknowledge Moose's affections for him. Jughead, after accidentally discovering Archie and Grundy holding hands, deduces their secret and confronts Archie for refusing to go to the sheriff. Archie asks his father for advice, and decides to come clean. Cheryl strikes up a friendship with Betty, but it soon ends when it becomes clear that she blames Betty's sister, Polly, for Jason's death. At a pep rally in his honor, Cheryl runs away after imagining her brother on the field; in the locker room, where Veronica has followed to comfort her, Cheryl admits to her that Jason was supposed to "come back". Against her mother's wishes, Betty renews her friendship with both Archie and Veronica, while Archie also reconciles with Jughead. The next day, during science class, Cheryl is arrested due to evidence from Jason's autopsy, which revealed that he was actually murdered a week after the Fourth of July.
#3 "Chapter Three: Body Double" - Feb. 9, 2017
Cheryl is questioned by the sheriff about her role in Jason's death, but she gets bailed out by her parents. Betty, upset with how her mother is attacking the Blossom family in the press, restarts the school newspaper, the Blue and Gold, and sends Jughead to interview the Adventure Scouts who found Cheryl at Sweet Water River just after Jason died. Veronica is horrified to learn that her new boyfriend, Chuck Clayton, has been slut shaming her to the rest of the school, and when he refuses to stop, she, Betty, and Cheryl find evidence linking him and his friends, including Jason, to the shaming. Jughead learns from one of the Scouts that the shot heard on July 4th was fired by the troop's Scoutmaster, Dilton Doiley, during a training exercise. Betty and Veronica drug and torture Chuck until he apologizes, and Jughead pressures Dilton to come clean. Archie's dad builds him a studio to practice, Chuck is kicked off the football team, and Betty and Cheryl burn the evidence after agreeing to help each other find the truth about Jason and Polly. Dilton reveals that he saw Ms. Grundy's car by the river, and Jughead realizes Archie's secret is at risk.
#4 "Chapter Four: The Last Picture Show"
February 16, 2017
Jughead despairs over the news that the local drive-in where he works is closing, comparing Riverdale to Salem. At the diner, Betty spots Archie and his father having dinner with Ms. Grundy, and she confronts him about their relationship. Under the guise of an interview, Betty questions Ms. Grundy about her life, while Veronica demands answers from her mother; Hermione insists that nothing shady happened. Betty and Veronica meet with Archie and inform him that there is no trace of Geraldine Grundy ever existing, aside from a woman who died seven years ago. They break into her car and find a gun and ID with the name "Jennifer Gibson". Grundy reveals that she was in an abusive relationship, and only wanted to escape. At the drive-in's final night, Veronica spots her mother meeting with the same man from before. Alice exposes Archie's affair and threatens to put Grundy on trial, but agrees not to so long as she leaves town. Sheriff Keller finds that all of his evidence pertaining to Jason's murder has been stolen. Jughead vandalizes the projectionist's booth/former temporary home in full view of the Serpents' leader, who turns out to be his father.
#5 "Chapter Five: Heart of Darkness"
February 23, 2017
Cheryl's parents refuse to allow her to speak at Jason's funeral memorial, but she does so anyway, in the white dress she wore the last time she saw him, and breaks down during her address. Coach Clayton pits Archie and Reggie against each other for the coveted spot of team captain. Archie is introduced to a potential songwriting mentor, who ultimately does not agree to teach him. Trev informs Betty that Jason had become much more secretive in the weeks before his death, and was rumored to be selling drugs. Jughead suggests searching the Blossom family mansion for clues, during which he and Betty encounter Jason's grandmother, who mistakes Betty for Polly and tells her not to let Penelope know that she and Jason were engaged. While cleaning the diner, Hermoine finds a box with a snake inside it, a warning from the Serpents. Betty learns that her family has hated the Blossoms ever since their ancestor cheated the Coopers out of a fortune decades before. Archie is named captain, but turns it down to focus on his music. Jughead and Betty deduce that her father is responsible for stealing the murder evidence.
#6 "Chapter Six: Faster, Pussycats! Kill! Kill!"
March 2, 2017
With Riverdale High's annual variety show approaching, Valerie's efforts to help Archie prepare for his debut performance leads to a major fallout with Josie. Meanwhile, Betty and Jughead's investigations into Jason's murder brings them face-to-face with Betty's sister Polly, who is revealed to be captive at a home for troubled youths, unaware of Jason's death, and seven months pregnant. As Veronica decides to rebuild her relationship with her mother, she learns that Hermione is using her for her own purposes. At the same time, Hermione's first day of work at Andrews Construction brings her closer to Archie's father, Fred. Josie deals with her own family pressures after her father visits for her performance at the variety show. Betty confronts her parents about Jason's death, to no avail, but grows closer to Jughead, eventually kissing him. After, they discover a car hidden in the woods containing drugs and Jason's belongings. However, an unknown perpetrator torches the car and destroys all incriminating evidence before the police arrive, and Polly escapes from the home.
#7 "Chapter Seven: In a Lonely Place"
March 9, 2017
Cheryl informs Sheriff Keller that Polly has escaped, and the town organizes a search party to find her. As tensions continue to grow between the Blossoms and the Coopers, Betty finds her sister hiding in the attic of their house. Cheryl offers to help Betty take care of Polly. F.P., after being offered a job by Fred, reveals that he and Fred founded Andrews Construction together, but that Fred kicked him out of the business after bailing him out of jail. Fred counters that F.P. was stealing money from him and abusing drugs and alcohol and that he had no choice. Jughead is taken into custody as a suspect in Jason's murder, but Fred provides Keller with an alibi. Cheryl suspects that her parents have bad intentions with Polly, and so Polly moves in with the Lodges instead. F.P. is revealed to have Jason's jacket in his trailer.
#8 "Chapter Eight: The Outsiders"
March 30, 2017
Polly reveals to Sheriff Keller that Jason was supposed to make a drug delivery for "some biker gang", implied to be the Southside Serpents, in exchange for money before both of them ran away. Veronica suggests hosting a baby shower for Polly. Fred's workers leave because of payment by Clifford Blossom. Archie tries to help Fred by getting some friends to continue work on the construction project. After a confrontation with F.P. Jones in a Serpents' bar, Archie realizes Jughead's father is a Serpent. At the baby shower, Penelope and Alice fight over whom Polly should live with. Alice finds out that Hal had previously tried to take Polly to get an abortion and then kicks him out of the Cooper Household. F.P. recruits some of his Serpents to replace Fred's crew, and informs Hermione that Hiram is behind the attack on Fred's construction site. Polly chooses to live with the Blossoms.
#9 "Chapter Nine: La Grande Illusion"
April 6, 2017
As the Blossom family's annual maple tree-tapping ceremony approaches, Cheryl asks Archie to be her escort. When he refuses, Penelope offers to get him into an exclusive music school as a favor. Veronica grows close to Ethel, but when Hermione reveals that her father was one of Hiram's investors, she becomes distraught upon learning that he attempted suicide after losing his home. Alice prepares to publish a full-blown expose on the Blossoms, but Hal retaliates for being thrown out by firing her from the paper. Finding that everyone in his life disapproves of him mingling with Cheryl, including Val who believes Cheryl plans to steal Archie away from her, Archie asks Cliff to assist his father in return for him agreeing to help present Cheryl as a worthy successor. The two share a kiss, but a confused Archie leaves. While doing so, he overhears her parents discussing how they conspired to have Hiram arrested. Betty gets a call from Archie, learning that Polly moved in with the Blossoms to learn the truth about Jason's death. She and Jughead decide to write the tell-all expose in the Blue and Gold and ask Alice to join them. Finally realizing that the Blossoms' are using him, Archie attempts to reconcile with Val, but she breaks up with him. Cheryl plots to remove both Archie and Polly from her life.
#10 "Chapter Ten: The Lost Weekend"
April 13, 2017
Fred leaves for Chicago to finalize his divorce, leaving Archie alone. Betty learns that Jughead's birthday is coming up, and that he has never had an actual party. She and Veronica persuade Archie to let them throw it at his house. Veronica's father threatens to retaliate against her mother if Veronica refuses to testify on his behalf. The Vixens elect Veronica as their captain for Homecoming over Cheryl, and she retaliates by crashing the party with Chuck and his friends. F.P. also shows up, on Betty's advice. Jughead argues with Betty and tries to leave, but Cheryl forces him to stay for a "game" in which participants are forced to reveal their secrets. Jughead and Chuck get in a fight, and F.P. declares the party over. He urges his son to reconcile with Betty and confronts Alice, implying she was once a member of the Serpents. Archie and Veronica comfort each other and share a kiss. Veronica subsequently changes her mind and agrees to testify on her father's behalf. Fred returns home with, to Archie's surprise, his mother Mary.
#11 "Chapter Eleven: To Riverdale & Back Again"
April 27, 2017
While Archie and his mother reconnect, Veronica learns that her father may soon be released from prison. F.P. questions the purpose of Jughead's novel, urging him to consider moving on. To learn the truth about Hiram, Veronica decides to investigate F.P. as a possible suspect in Jason's murder. The Blossoms, increasingly suspicious of Polly, forbid her to enter their master bedroom. Fred and Mary agree to attend Homecoming together. Polly and Cheryl discover the former's engagement ring in Penelope's jewelry collection, which she claims is because Jason threw it away in disgust after arguing with his father. At a contentious dinner, Alice tries to question F.P., but he shuts her down. Afterwards, he informs Jughead that they will be moving to Toledo to reunite with the rest of the Jones family. While Archie and Veronica perform "Kids in America" at Homecoming, the police execute a search warrant on F.P.'s trailer, find a gun, and arrest him for murder. Jughead disappears, and Archie and Veronica deduce that someone is framing F.P. for Jason's death.
#12 "Chapter Twelve: Anatomy of a Murder"
May 4, 2017
Jughead calls his mother, but she refuses to let him move in with her. F.P. confesses to everything, including Jason's murder. Betty and Alice catch Hal trying to destroy evidence, and learn the family secret: the Coopers are, in fact, Blossoms by blood, and Jason and Polly's relationship was technically incest. The Coopers take Polly back to their home. Mary, posing as F.P.'s lawyer, advises Jughead to visit his father, who tells him never to come see him again. With Joaquin's help, the group tracks down one of F.P.'s associates, but find him dead of overdose. The police are summoned, and find a bag full of money with Hermione's initials on it. With both Hal and Hermione cleared as suspects, Jughead and Betty investigate a lead from Kevin, and find Jason's varsity jacket. Inside one of the pockets, they find a thumb drive and discover Clifford murdered Jason, before informing Cheryl. Nevertheless, Jughead learns that his father's other charges will not be dropped. Veronica learns that her father has been formally released, and Mary returns to Chicago. When the police go to arrest Clifford, Cheryl directs them to his corpse hanging in the syrup distillery, next to several open casks filled with drugs.
#13 "Chapter Thirteen: The Sweet Hereafter"
May 11, 2017
It is revealed that Clifford Blossom was in the drug business and that Jason found out, leading to his abduction and subsequent death at the hands of Clifford. F.P. is cleared of any charges relating to the murder but remains in police custody. Alice reveals to Betty that in high school, she found out that she was pregnant, but Hal sent her to the Sisters of Silent Mercy and made her give up the child, a baby boy, for adoption. Jughead is placed in the care of a foster family and transfers to Southside High. After receiving a text from Cheryl announcing she is going to commit suicide, Veronica, along with Archie, Betty, and Jughead, rush to Sweetwater River, where Archie manages to punch though the ice and save Cheryl. Cheryl later burns down her mansion, much to Penelope's dismay. Archie meets his father at Pop's where a masked man arrives with a gun and demands Pop show him the safe. He then tells Fred to turn over his wallet, pointing his gun at him. Archie tries to save his dad, but Fred is shot.