A Korean immigrant who manages the Miracle Submarine HBOT facility alongside her husband. Formerly a philosophy student in Korea, she now manages her new life in America and the aftermath of a tragic fire at their clinic. She feels isolated from her husband and daughter, bearing a heavy burden of guilt and suspicion as the trial unfolds.

A medical doctor who was receiving HBOT treatments for infertility at the time of the explosion. He suffers from severe burns and the loss of two fingers due to the fire. He harbors personal insecurities regarding his marriage and infertility, making him a reluctant and defensive participant in the courtroom.

A dedicated mother to her daughter, Rosa, who has severe cerebral palsy. She acts as an empathetic force among the parents utilizing the HBOT chamber. She deeply understands the grueling physical and emotional toll of being a full-time caregiver to a child with severe disabilities.

An immigrant father and the primary operator of the Miracle Submarine HBOT facility. Previously separated from his family for four years as a wild-goose father working in Korea, he struggles with feelings of inadequacy and a lack of confidence in his English. He was paralyzed from the waist down while trying to rescue patients during the fire.

The teenage daughter of Pak and Young Yoo. She struggles deeply with her life as an immigrant in America, harboring resentment toward her mother for the bullying and loneliness she endured during their early years in the country. She suffers from severe PTSD following the explosion, which left her temporarily comatose and scarred.

A devoted, exhausted mother currently standing trial for the murder of her autistic son, Henry. Prior to the fire, her entire existence revolved around managing Henry's rigorous therapy schedules and experimental treatments. She presents a remarkably calm, almost detached demeanor in court, drawing the ire of the public and the prosecution.

Matt's wife and the daughter of a successful acupuncturist. She struggles with marital tension stemming from infertility issues and her husband's defensive behavior. As a Korean American, she frequently experiences and resents casual racism from those around her.

Elizabeth's eight-year-old son who falls on the autism spectrum. He is considered a Super Responder to biomedical treatments, though his social difficulties remain present. He tragically perishes in the Miracle Submarine fire.

A mother to a severely autistic son, TJ. She dies in the fire after catching flames while holding her son's helmet. Prior to the explosion, she had a complex, deteriorating friendship with Elizabeth stemming from their differing approaches to managing their children's autism.

Kitt's severely autistic son who partakes in the HBOT treatments. He survives the fire but struggles with profound behavioral challenges and intense meltdowns.

Teresa's daughter who has severe cerebral palsy. She survives the explosion with minor injuries.

Elizabeth Ward's defense attorney. She aggressively cross-examines witnesses and attempts to shift the blame onto other potential suspects. She hopes to create reasonable doubt for her client.

The district attorney prosecuting Elizabeth Ward for murder and arson. He builds a steady narrative portraying Elizabeth as an abusive mother who wanted to be rid of her disabled child.

An anti-HBOT protestor who believes that parents should accept their autistic children rather than try to cure them. Her presence at the facility adds significant tension leading up to the fire.

The detective who investigated the fire and prior reports of child abuse against Elizabeth Ward. She testifies about the suspicious circumstances surrounding the explosion.