Cha Yo-Han—an arrogant but genius doctor of anesthesiology—and Kang Shi-Young—a smart, warm resident of anesthesiology—work together to help people with mysterious cases of acute or chronic pain.
Doctor John (Season 1)

Between hope and despair (Episode 1)
Air date: 2019-07-19
Runtime: 61 min
Overview: Hours before leaving the country, Kang Si-yeong steps in as a correctional physician and saves a life with the helping hand of Cha Yo-han.

0.00001% hope (Episode 2) 9.0
Air date: 2019-07-20
Runtime: 60 min
Overview: Lee Yu-jun warns Si-yeong about Yo-han. When she confronts Yo-han about his diagnosis and crime, he questions the source of her anger.
Champions (Episode 3) 8.0
Air date: 2019-07-26
Runtime: 67 min
Overview: Yo-han's past precedes him at his new workplace. Dreading a painful future, a famous athlete makes a heart-stopping request.
Facing your fears (Episode 4) 9.0
Air date: 2019-07-27
Runtime: 60 min
Overview: Si-yeong begins to understand Yo-han’s philosophy on pain management upon hearing the full account of the events from three years ago.
21g, the Weight of a Soul (Episode 5) 9.0
Air date: 2019-08-02
Runtime: 62 min
Overview: As patients fill the Pain Management Center, one in particular catches Yo-han's eye with his lack of symptoms. Son Seok-gi approaches Si-yeong.
Memories of pain (Episode 6) 9.0
Air date: 2019-08-03
Runtime: 62 min
Overview: Yo-han lets history convince a young patient to undergo major surgery. Si-yeong wins Yo-han's praises for finding answers through patients' stories.
Secrets & lies (Episode 7) 9.0
Air date: 2019-08-09
Runtime: 66 min
Overview: Si-yeong becomes the first person to learn of Yo-han's secret. A suspected pandemic-infected patient enters the Pain Management Center.
Understanding someone (Episode 8) 9.0
Air date: 2019-08-10
Runtime: 60 min
Overview: The pain management team diagnoses a patient at war with unknown demons. Heo Jun asks for forgiveness. Si-yeong confesses her feelings.
Terminal: Terminally ill, incurable (Episode 9) 9.0
Air date: 2019-08-16
Runtime: 67 min
Overview: A former actress receives treatment for a rare kind of cancer. Yo-han starts to experience worrying symptoms.
An ominous foreboding on a sunny afternoon (Episode 10) 9.0
Air date: 2019-08-17
Runtime: 60 min
Overview: Yo-han's doctor tells him to choose between his career and his life. Min Tae-gyeong makes up her mind about her husband. A patient loses all hope.
Up (Episode 11) 8.0
Air date: 2019-08-23
Runtime: 60 min
Overview: During an investigation into a patient's switched-off ventilator, Seok-gi is surprised by the findings and Yo-han's actions.
Schrödinger's Cat (Episode 12) 9.0
Air date: 2019-08-24
Runtime: 60 min
Overview: Si-yeong embraces her role as Yo-han's guardian. A young patient returns with new symptoms. Yo-han and Seok-gi learn about each other's conditions.
The promise of trying (Episode 13) 9.0
Air date: 2019-08-30
Runtime: 60 min
Overview: Without consulting Seok-gi, Chae Eun-jeong takes matters into her own hands by publicly questioning Yo-han's qualifications to treat patients.
Select any (Episode 14) 9.0
Air date: 2019-08-31
Runtime: 60 min
Overview: Seok-gi gets a tip from an unexpected source. At the disciplinary hearing, Yo-han's supporters advocate on his behalf.
The mind of the departed (Episode 15) 9.0
Air date: 2019-09-06
Runtime: 60 min
Overview: Si-yeong tearfully bids farewell to loved ones. After pushing her away out of fear, Yo-han finally gives her his answer.
Breaking up is like breaking up with someone you hope to see again someday (Episode 16) 9.0
Air date: 2019-09-07
Runtime: 60 min
Overview: To Si-yeong's relief and disbelief, Yo-han reappears in front of her after three years of silence. His vision for healing comes to fruition.

Seasons

Episodes 16