Series synopsis
Mary Kills People, also known as 메리 킬즈 피플 is a South Korean drama crime television series that premiered on MBC on August 1, 2025. It ended on September 12, 2025. It was created by Tara Armstrong. It stars Lee Bo-young, Lee Min-ki, Kang Ki-young and Bek Hyun-jin.
Dr. Mary Harris, a single mother and emergency doctor by day, also moonlights as an underground angel of death - helping terminally ill patients who want to die and slip away on their own terms. So far Mary has managed to stay under the radar; but business is booming, and her double life is getting complicated. When her world starts to unravel, Mary realizes she's going to have to fight dirty if she's going to stay in the killing game.
Premise
Dr. Mary Harris, a single mother and emergency doctor by day, also moonlights as an underground angel of death - helping terminally ill patients who want to die and slip away on their own terms. So far Mary has managed to stay under the radar; but business is booming, and her double life is getting complicated. When her world starts to unravel, Mary realizes she's going to have to fight dirty if she's going to stay in the killing game.
Premise: Life is hard. Death is easy.
Cast and characters
Leading cast
- Lee Bo-young as Wu So-jung
- Lee Min-ki as Cho Hyeon-woo
- Kang Ki-young as Choi Dae-hyeon
- Bek Hyun-jin as Koo Kwang-cheol
- Kim Tae-woo as Ahn Tae-seong
- Yoon Ga-i as Choi Ye-na
- Kwon Hae-hyo as Father Yang
- Seo Young-hee as Ryu Yi-su
Supporting cast
- Yoo Seung-mok as MP Baek
- Kang Na-eon as Wu-mi
- Tae Hang-ho as Detective Bu
- Kwak Sun-young as Koo Hye-rim
- Min Hye-su as Nun
Episodes
This series spans 3 seasons with 24 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 12 | August 1, 2025 | September 12, 2025 |
| Season 2 | 6 | January 3, 2018 | February 7, 2018 |
| Season 3 | 6 | May 12, 2019 | June 17, 2019 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Do You Want to Finish? A terminal patient, Hyun-woo, requests assisted death from the doctor, Wu So-jung (Lee Bo-young), and her assistant Dae-hyun (Kang Ko-young). |
August 1, 2025 |
| 2 |
Why Do You Do this? Wu So-jung begins to cross a line as she develops feelings towards Hyeon-woo (Lee Min-ki) |
August 2, 2025 |
| 3 |
I'll Send You Wherever You Want So-jung and Dae-hyeon become trapped, as the police investigation closes in. |
August 8, 2025 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
The Means Des is happy to reteam with Mary following his stint in prison - but when a routine case leads to a devastating outcome, Mary questions whether she was better off fighting the good fight without him in control and unchallenged. |
January 3, 2018 |
| 2 |
The Connection When Olivia attempts to blackmail Mary, she is drawn deeper into a deadly game of cat and mouse that has a surprising connection to Ben. |
January 10, 2018 |
| 3 |
Twin Flames Mary and Ben decide to join forces and hide Travis at Ben's secluded trailer. But when Travis reveals a crucial detail about Ben's investigation, Mary is forced to reconsider their alliance. |
January 17, 2018 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
The Key to Faith Mary secretly takes in patients, but one death doesn't go as planned. |
May 12, 2019 |
| 2 |
Girl Problems Mary promises Des that she'll never put the hospice at risk again. Mary and Frances meet an elderly cancer patient. Jess realizes that something's wrong with Naomi. |
May 19, 2019 |
| 3 | No Happy Ending Here | May 27, 2019 |
Production
Release
| Original network/platform | MBC |
|---|---|
| First aired | August 1, 2025 |
| Last aired | September 12, 2025 |
| Runtime | 45 minutes |
| Status | ended |
| Schedule | Friday, Saturday at 22:00:00 |