Lee Bo-young delivers a performance so fearless it left me questioning everything I thought I knew about her work. This August, get ready to dive into a story where compassion and controversy collide on screen.
A Sensitive Theme Elevated by a Stellar Cast
When I first heard that MBC was tackling euthanasia head-on, I admit I was skeptical—K-dramas rarely go this far. Yet, according to MBC’s official press release, Mary Kills People will premiere on August 1, 2025, promising a deep dive into assisted dying and the moral struggle that comes with it. Lee Bo-young stars as Dr. Woo So-jung, a physician moonlighting as a secret ally to patients facing terminal illness. It’s a radical shift from her usual warm-hearted roles; I remember watching her in lighter fare and thinking, “She can handle anything”—but this role pushes her into darker, more complex territory.

Opposite her, Lee Min-ki embodies Jo Hyun-woo, a man grappling with a terminal brain tumor whose final days become unbearably tense. Kang Ki-young steps in as Detective Choi Dae-hyun, determined to uncover So-jung’s clandestine activities. Rounding out the ensemble are Lee Sang-yoon, Kim Tae-woo, and Lee Yi-kyung—names that Korean drama fans trust to bring depth and nuance to every scene. The Korea Communications Standards Commission (KCSC) has already slapped a 19+ rating on the series, citing its unflinching look at end-of-life choices and the emotional fallout that follows.
A Haunting Teaser Sets the Tone
I remember hitting pause the first time the teaser popped up on MBC’s YouTube channel—it felt more like watching a short film than a promo. In a dimly lit operating room, So-jung pours a mysterious liquid into a glass of champagne. Over the hushed clink of crystal, the words “I am a doctor. For some, a savior. For others, a killer.” flash across the screen. My stomach knotted as I replayed that line; it perfectly encapsulates the psychological thriller at the heart of the show.

The teaser’s final moment is even more chilling: So-jung stands before a statue of the Virgin Mary, whispering “Maria,” only to be answered, “You are no longer Mary.” That single exchange set my mind racing—How far will she go? What lines will she cross? With its meticulous cinematography and a premise ripped from real-world debates on mercy-killing, this K-drama isn’t just another binge-watch—it’s a conversation starter. Don’t miss your chance to see Lee Bo-young redefine what it means to play a hero on screen.