|“||Even though we were twins, I used to demand I have my own birthday party. Until one year, out of the blue, Jason convinced me we had to combine them into one. It wasn't until years later, I found out why. It was because no one wanted to come to mine. And Jason didn't want me to know. He protected me. Every single day. I wish, that day at the river, I had protected him. I'm so sorry, Jay-Jay. We failed you. All of us.||”|
|— Cheryl at Jason's memorial[src]|
Jason was the son of Clifford and Penelope Blossom, and the twin brother of Cheryl Blossom. He was captain of the school water polo team and a member of the Riverdale Bulldogs. He supposedly died under mysterious circumstances when he fell from a boat into Sweetwater River on July 4th, prior to the start of the series. But as it turns out, he died a week later around July 11th when he was shot by an unknown assailant, who was later revealed to be his own father, Clifford Blossom. He is also the late father of Polly's twins, Juniper and Dagwood.
After his body was found, Jason was buried in the cemetery on the grounds of Thornhill. Prior to the discovery of his body, his parents buried an empty casket. During the third season, the Farm dug up Jason's body in efforts to gain Cheryl's loyalty. Unable to part with him again, she kept his corpse hidden inside Thistlehouse. However in "Chapter Sixty-Six: Tangerine", Cheryl was finally able to let go of Jason and gave him an Viking funeral on Sweetwater River.
Jason grew up in Riverdale, alongside his twin sister, Cheryl Blossom. Prior to the start of the series, he was in a relationship with Betty Cooper's sister, Polly. According to Betty, he meant the world to her but she meant nothing to him. The relationship ended badly, Cheryl speculated that Jason was likely the reason that Polly suffered a nervous breakdown and was sent to live in a group home.
When Jason and Cheryl were younger, their mother would take them upstairs into their rooms, where she would tell them bedtime stories about the Sugarman, her very own concocted version of a child's Bogeyman, in an attempt to turn an all-too-real monster into something less. Little did Jason know at the time, the Sugarman was real, and looking to protect them from the danger that followed was their mother, who sent Jason and Cheryl into their rooms whenever he would visit Thornhill.
After Fred Andrews suffered a gunshot wound during a supposed robbery at Pop's Chock'lit Shoppe, Fred had a number of odd dreams during his drift in and out of consciousness — one of which included Jason, who sat in the crowd, alongside his father, as Archie and Veronica got married.
The Haunting of Thistlehouse
Jason appears in Archie's dream. He sits at the table alongside Cheryl, Penelope, Clifford, Reggie, Hiram, Hermione, Alice, Hal, Pop Tate, Kevin, Tom, Sierra, FP, Jellybean, Toni, Jughead, Betty, and Mary in his dining room. Archie asks where his father is, to which Arti replies that Archie was supposed to go get him.
At Thistlehouse, Cheryl awakens to find her mother, father, brother, and her Nana Rose standing at the end of her bed. Penelope is holding Julian the doll explaining that they’ve come to give Cheryl’s body to Julian.
Jason's body is discovered by Uncle Bedford in the ancestral chapel, sitting in his wheelchair with Julian in his arms. This discovery leads Bedford to threaten Cheryl and attempts to strangle her, but he is killed by Tonito save Cheryl.
During the very cold night of the ice storm, Jason is transported in his wheelchair by Toni to the dining room after Nana Rose told a gruesome story of cannibalism perpetuated by Blossom family on Cheryl's direction. Aunt Cricket and Cousin Fester, who came to investigate the disappearance of Uncle Bedford, are almost as terrified of the sight of Jason's corpse as of the possibility of having eaten Uncle Bedford in the meatpie.
Farewell, Jason Blossom
After a therapy session with the school counselor, Cheryl decided to end the Haunting of Thistlehouse and find out once and for all who wants to drive her cuckoo bananas. Sitting between Jason and Julian in the living room sofa, Cheryl poisons the whole house with gas. Penelope is forced to come out and be tried by her daughter in front of Nana Rose, Toni, Jason, Julian, Juniper and Dagwood.
To continue the healing process, Cheryl decides it is time to say goodbye to her brother. After inviting Archie, Veronica, Betty and Jughead to attend, as they saved her from attempting suicide, Cheryl sets fire to the boat on which she laid Jason and the pyre is pushed by Jughead and Archie into the waters of Sweetwater River. While the corpse is consumed by fire, Cheryl cries and says she would have liked Toni to have known the real Jason.
Jason was a moderately slim young man of medium stature, around 6' 1", with pale skin, red hair, and steel blue eyes. Ironically, despite his leading position on the Riverdale Bulldogs, he was not an especially muscular individual. He was often seen wearing his blue and gold varsity jacket though. According to Veronica Lodge, Jason was "crazy handsome", and Cheryl agreed, saying that he was the "handsomest".
As Jason was killed prior to the start of the series, not much information about his personality was known at first. His personality was deduced through his interactions with other characters. He bullied Jughead at school from time to time. However, according to Cheryl, he was the best brother anyone could've asked for, and was a genuinely nice person who didn't deserve to be tortured and murdered. Jason was very protective of his loved ones, especially Cheryl. When they were younger, Cheryl insisted on having separate birthdays from Jason despite the fact that they were twins, until one year, he randomly recommended that they combine their birthdays into one. It was not until years later that Cheryl discovered the reason for this was that no one would come to her birthday. Jason protected her feelings whenever he thought it was needed.
|“||Turns out, maple syrup was a front for his true business. Transporting heroin from Montreal on his trucks. A narrative quickly emerged. That Jason Blossom learned about dear old Dad's drug running, and threatened to expose the truth. Which led to Jason's abduction at the hands of a Southside Serpent named Mustang. And then to Jason's murder at the hands of his father.||”|
|— Jughead Jones and Alice Cooper about Jason and Clifford[src]|
The father-son relationship between Jason and Clifford Blossom was riveting, to say the least. Little is known of their relationship but it is presumed it was filled with hatred despite the fact that according to Cheryl, Jason was the golden-boy who could do no wrong. Jason was being groomed by his father to take over the family business. However, Jason didn't share this desire and this led to his demise, at his own father's hands. Upon learning of his father's illegal transportation of heroin to Montreal on the maple trucks, Jason attempted to run away and start his life over with his then pregnant fiancée, Polly Cooper. Unfortunately for Jason, his father learned of his plan to run away, ultimately resulting in Jason's untimely death.
|“||How dare you, Alice Cooper! Printing my son's autopsy? He was tortured and shot, and thrown in the river like a piece of garbage.||”|
|— Penelope scolding Alice for printing Jason's autopsy[src]|
The mother-son relationship between Penelope and Jason is mostly shrouded in mystery. It is currently unknown exactly how close they were before his untimely death, but Penelope was devastated to learn of Jason's murder. Notably, Jason was the family heir, who according to Cheryl was the golden-boy. So it can be presumed that Penelope looked favorably on him. Although, approaching Jason's death, their relationship seemed to have soured as Jason was set to leave town, going so far as to fake his own death in order to be rid of his parents.
- "Chapter Fifty-Eight: In Memoriam" (corpse and dream)
- "Chapter Fifty-Nine: Fast Times at Riverdale High" (corpse)
- "Chapter Sixty: Dog Day Afternoon" (corpse)
- "Chapter Sixty-One: Halloween" (corpse)
- "Chapter Sixty-Three: Hereditary" (corpse and dream)
- "Chapter Sixty-Four: The Ice Storm" (corpse)
- "Chapter Sixty-Five: In Treatment" (mentioned)
- "Chapter Sixty-Six: Tangerine" (corpse)
- "Chapter Seventy-One: How to Get Away with Murder" (mentioned)
- "Chapter Two: You Can't Hurry Love" (mentioned)
- Jason was in an independent study program with Geraldine Grundy while at Riverdale High School. She considered him to be inspirational.
- According to Cheryl, Jason always adored the drive-in.
- Jason is older than Cheryl by three minutes.
- Jason has never spoken on-screen and, to date, he only did it in the prequel novel, Riverdale: The Day Before.
- Jason's dummy was created by Sandra Lindala and Emersen Ziffle of Lindala Schminken FX. Throughout Riverdale, the dummy has been modified for script requirements.
- Three faces were sculpted based on the features of Trevor Stines. The first is puffier and has a bullet wound in the forehead, and was used in the first season. The second head, used in Season 3, has mouth and eyes sewn shut. The third, used in Season 4, has its mouth and eyes open again and the wound has been closed, ideally sewn by Cheryl.
- Body hair is individually punched and the wig, made of real hair, is glued so that it can be combed.
- The dummy of the first season was heavier for underwater scenes. Subsequently, the weight was removed with a poseability to the body aimed to make it "multi-functional".
- In the Archie Comics, Jason Blossom is Cheryl's arrogant twin brother and make their first appearance in Betty & Veronica #320 in October 1982. The same month, Jason also appears in Jughead #325, in the story titled "Barely Friendly".
- In the comics, the Blossoms live in Pembrooke, the rich side of Riverdale and Jason and his rich friends refer to the other side's citizens as "Townies".
- In the 2019 Blossoms 666 comic book, Jason and Cheryl have another twin, Julian. In this series published by Archie Horror, the three of them compete for the title of Anti-Christ.
- In the comics, Jason's love interest is Betty, not Polly despite Veronica was closer to his social status. This often cause him to fight with Archie, who's also in love with Betty.
- See also: Category:Images of Jason Blossom