- Cheryl's great-grandfather murdered Betty's great-grandfather over greed and hate. They were business partners in the selling and trading of maple syrup. However, one day, Cheryl's great-grandfather, no longer wanting to share the profits, murdered Betty's. This sparked a blood feud between the Blossoms and the Coopers.
- Hermione Lodge and Fred Andrews dated in high school. It was a brief relationship, due to Hermione choosing the rich kid, Hiram Lodge over Fred.
- Jughead Jones was born on October 2, 2001.
- In 2009, Jughead was sent to a juvenile detention facility for attempting to burn down Riverdale Elementary School.
- Hiram Lodge hired the Southside Serpents to decrease the property value of the Twilight Drive-In, in order for the Lodges to by the land at a cheaper price.
- Hiram Lodge was arrested for fraud and embezzlement May of 2017.
- Archie and Jughead were supposed to go on a road trip over the weekend of July 4th. However, Archie cancelled at the last moment.
- Archie's reason for cancelling to road trip was to get together with Geraldine Grundy at Sweetwater River. The two of them heard a gunshot, the shot that was initially believed to have killed Jason.
- Cheryl and Jason drove out to Sweetwater River on the early morning of the 4th of July, for a boat ride, during which time the boat tipped, Jason fell in and supposedly drowned.
- It would later be revealed that Cheryl and Jason fabricated the entire story. The truth was that Jason wanted to leave Riverdale, and never come back. He looked to Cheryl for assistance in staging the accident, so that his parents wouldn't come looking. Cheryl and Jason made it to the other side of the river unharmed, this is where they parted ways.
- Upon learning that she was pregnant, Polly Cooper and Jason Blossom planned to run away together, and start their new family in a beautiful place. The plan would occur on July 4th.
- Jason was killed on July 11th.
- Coincidentally, this is the same week that the Blossom family buried an empty casket, as Jason's body hadn't yet been found.
- Hermione and Veronica Lodge arrived to town on the last day of Summer vacation.
August - SeptemberEdit
- The first day of Sophomore year for Archie, Jughead, Betty, Veronica, Kevin, Josie and several others.
- That following Saturday, Riverdale High School would host a back-to-school Semi-formal.
- Later that night, Kevin and Moose would go on to find Jason's body at the shore of Sweetwater River.
- Jason's autopsy would commence that following Monday. An autopsy which revealed signs of animal scavenging, ligature marks, and him being frozen.
- A pep-rally was held the Friday succeeding the discovery of Jason's body.
- Cheryl was detained as a possible suspect in the murder of her brother. She admitted to lying, but not killing Jason.
- Veronica, Betty, Cheryl, Ethel, and many other female students took down Chuck Clayton and his posse. Unaware at the time, that this action would have terrible consequences in the weeks to come.
- The Twilight Drive-In was closed down, leaving Jughead without a job and a home.
- Betty and Jughead visited Polly at the Sisters of Quiet Mercy.
- With Polly's directions, Betty and Jughead found Jason's get away vehicle on the highway. Inside was his varsity jacket, drugs, and several other items. The vehicle was later set on fire.
- Following the revelation of Jason's death, Polly escaped the Sisters of Quiet Mercy group home.
- Kevin hosted the 75th annual Variety Show; Archie, and Josie and the Pussycats performed.
- Andrews Construction won the contract to the new land development.
- Polly was found in the attic at the Cooper house. Veronica and Hermione let her stay at their house because she needed to protect her unborn baby.
- She later went on to live with the Blossoms.
- Hermione and Veronica hosted a baby shower for Polly.
- Archie escorted Cheryl to the Blossoms' annual tree tapping ceremony, naming Cheryl as their honorary heir.
- Chuck Clayton returns to school on Oct 1.
- October 2nd, Betty and Archie host Jughead's sixteenth birthday party at Archie's house.
- Mary Andrews returned to Riverdale on October 2nd.