An ace doctor in a university hospital is wrongfully accused of a medical malpractice incident and gets ousted from the hospital. He then applies to work at a prison, where he plans to make personal connections with all the big shots in prison with the ultimate goal of getting revenge against the hospital that kicked him out.
Seasons
1 listed
Status
Ended
Seasons
1 season
Episodes
32 episodes
First aired
Mar 20, 2019
Last aired
May 15, 2019
Episode length
35m
Network
KBS2
Latest episode:S1 E32 Episode 32 (May 15, 2019)
Season 1
32 episodes Mar 20, 2019 8.9
After his career is sabotaged by the wealthy, a doctor gets a job at a prison seeking vengeance on those who are too powerful to be governed by the law.
"A gripping, twist-heavy revenge thriller powered by Namkoong Min and a vicious villain lineup, undercut by repetitive plotting, shaky medical logic, and an underused female lead."
Tight pacing, intricate cat-and-mouse schemes, and commanding performances from Namkoong Min, Choi Won-young, and Kim Byong-chul make the revenge story addictive and intense, with the prison setting adding extra bite. Over time, repeated turn-the-tables maneuvers, questionable medical realism, and a sidelined female lead draw criticism, and some viewers find the production choices and late-game resolution less satisfying than the build-up.
What viewers praise
Magnetic lead performanceNamkoong Min’s turn from warm doctor to calculating avenger is widely praised as charismatic, nuanced, and the main reason the show stays compelling.
Top-tier villainsChoi Won-young and Kim Byong-chul earn strong praise for their chilling expressions, body language, and morally twisted characters that make confrontations memorable.
Fast, intense pacingEpisodes move quickly with constant twists, power plays, and reversals that keep the story from feeling dull even across 32 episodes.
Addictive mind gamesElaborate schemes, shifting alliances, and strategic battles of wits create a satisfying sense of outsmarting opponents again and again.
Atmospheric prison backdropThe focus on prison politics, legal maneuvering, and corruption gives the show a distinctive crime-thriller flavor beyond standard hospital drama beats.
Common complaints
Repetitive story beatsThe constant cycle of twists and counter-twists starts to feel formulaic and exhausting in the latter half, with some viewers calling the plot typical despite being entertaining.
Underdeveloped female leadKwon Na-ra’s character is repeatedly noted as underwritten and sidelined, with her potential and importance to the story never fully realized.
Unrealistic medical elementsFrequent protocol breaches and shaky medical logic are jarring enough that medically savvy viewers either struggle through the early episodes or mentally tune that aspect out.
Mixed feelings on the endingWhile some find the finale satisfying, others feel it leaves key characters insufficiently dealt with and does not fully pay off the elaborate setup.
Inconsistent production choicesVery dark lighting in prison scenes and occasionally mismatched background music draw complaints for distracting from dialogue and clashing with the tone.
Recommended for
Revenge thriller enthusiasts Namkoong Min fans Twisty crime drama watchers Medical-legal thriller fans Character-driven villain lovers
Buzz & Rumors
Public reports
THE SOFTEST SCANDAL: ALL THE REAL-LIFE TEA BEHIND DOCTOR PRISONER (2019)
Fans came for the ruthless revenge plots and chaebol corruption… but what was happening when the cameras stopped rolling? We dove into Korean press, Soompi interviews, forums, and rumor mills, and guess what: this drama’s biggest “scandal” is that everyone was almost too nice. Still, there is tea — it’s just more champagne than gasoline.
On-Set Drama (The Nice Kind)
Production staff say the Doctor Prisoner set — despite the show’s grim tone — was “full of endless laughter,” with the cast constantly joking between takes .
Leads Namgoong Min and Kwon Nara reportedly created a particularly “comfortable atmosphere,” bonding as they studied dense medical terminology together and ran lines side by side [2].
Villain duo Kim Byung-chul and Choi Won-young, who terrify viewers on screen, were known off camera for “dad jokes and ad-libs” the second the director yelled “Cut,” instantly deflating the tension they’d just built [2].
Supporting actors like Lee Da-in and Park Eun-seok were described as brightening the set with constant smiles, while Lee Min-young and Lee Joon-hyuk hammed it up for behind-the-scenes photos with peace signs and finger hearts like it was a fan meet, not a prison thriller [2].
In other words, on a show where everyone’s plotting murder, the real crime was excessive wholesomeness.
Money, Myth & The Hawaii Vacation “Scandal”
As the drama wrapped, Korean media ran with a sensational story: Namgoong Min was allegedly paying, out of his own pocket, to take the entireDoctor Prisoner staff on a luxury trip to Hawaii — a gesture estimated at around 300 million won (roughly $250,000) .
Cue headlines painting him as Saint Namgoong of the Chaebol Prison.
On KBS’s Entertainment Weekly, Namgoong Min looked genuinely baffled and shot the story down, saying, “I don’t know who wrote that article.” He clarified that he was paying for a trip for 10 of his own staff, not the whole production, and pointed out how astronomical the full-crew cost would have been [1].
Still, the core is true: he did personally fund a Hawaii vacation as a thank-you to his team — just not for hundreds of people. So the “scandal” turned into proof he’s actually a generous boss, with the press merely inflating the guest list [1].
So yes, the biggest controversy was… that Namgoong Min wasn’t quite as wildly generous as rumors claimed, just regular extremely generous.
Romance Rumors & Off-Screen Chemistry
On screen, Doctor Prisoner is famously light on romance, which only made fans more determined to ship the cast off-screen.
Namgoong Min and Kwon Nara were praised by staff for their easy “great chemistry” while working closely together, especially as they transformed into a surgeon and psychiatrist duo [2]. There were no confirmed dating rumors between the two — just fan imagination filling the vacuum.
Kwon Nara, however, did land in real-world dating chatter during the drama’s run. In July 2019, Korean outlets reported she was dating top actor Lee Jong-suk. Their agency quickly and firmly denied it, insisting the two were just in a “close senior–junior” relationship and nothing romantic .
That wasn’t her last trip through the rumor mill: later talk linking her with comedian Yang Se-chan was also denied, with statements reiterating they weren’t a couple [3].
None of this was tied directly to Doctor Prisoner, but fans absolutely folded the gossip back into their headcanons about So-geum’s love life.
Scandals, Lawsuits, and Leaks (Or the Eerie Absence Thereof)
For a show this dark, the production’s record is almost suspiciously clean:
No documented on-set feuds, lawsuits, or explosive scandals surfaced in entertainment news around the drama.
No credible reports of script leaks or mass reshoots; reviews instead talk about tight pacing and consistent character work .
Writer Park Gye-ok is mentioned in industry write-ups for doing research in real prison medical departments, but not for causing trouble; it’s all about craft, not chaos .
If you were hoping for a makjang-level real-world meltdown, this one’s more “functional workplace” than “hellish set from tabloid central casting.”
Wild Trivia & Soft Gossip
In post-finale statements, multiple cast members sounded almost sentimental:
Namgoong Min said he felt he’d grown as an actor by playing an anti-hero and would remember Na Yi-je for a long time .
Kim Jung-nan, who played chaebol criminal Oh Jung-hee, described the role as “an adventure and an experiment,” adding that her character felt like part of Doctor Prisoner’s “Avengers” squad – a little in-joke about how stacked the ensemble was [4].
Ha Young revealed Doctor Prisoner was her first-ever project, making her turn as Han Bit a rookie debut wrapped inside a brutal thriller [4].
Cast messages after the finale read like a love letter to the set: actors talked about learning a lot from senior colleagues, feeling the shoot went by too fast, and even apologizing to viewers who “hated” their characters at first (hello, Park Eun-seok) [4].
The off-screen story of Doctor Prisoner isn’t one of feuds and flameouts — it’s a suspiciously well-run revenge machine powered by generous lead actors, joke-cracking villains, and a cast that apparently left the backstabbing strictly to the script.
Entertainment rumors and trivia aggregated from public reporting. Treat speculation as
unverified unless a cited source confirms it.