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Bad Detective

Title: 나쁜 형사 / Bad Detective
Chinese Title: 壞刑警
Also known as: Less Than Evil
Formerly known as: 루터 / Luther
Genre: Psychological, Crime
Episodes: 32
Broadcast network: MBC
Broadcast period: 2018-Dec-03 to 2019-Jan-29
Air time: Monday and Tuesday 22:00 (2 episodes back-to-back)


This drama is remake of the BBC TV series “Luther”.

Woo Tae Suk (Shin Ha Kyun) is an experienced and well-established detective with a long professional career, but in spite of everything he is a lonely and bitter human being. It all has to do with him only focusing on solving cases, while his actions are completely controversial because it crosses the line between good and evil. Woo Tae Suk crosses paths with a female psychopath, Eun Sun Jae (Lee Seol) but he cannot arrest her because of lack of evidence. The woman eventually decides to help Woo Tae Suk solve other cases.


Main Cast

Shin Ha Kyun as Woo Tae Seok
Lee Seol as Eun Sun Jae / Bae Yeo Wool
Joo Yi Hyun as Bae Yeo Wool
Park Ho San as Jeon Choon Man
Kim Gun Woo as Jang Hyung Min

Serious & Serial Team

Baro as Hwang Dong Yoon
Bae Da Bin as Sin Ga Yeong
Bae Yoo Ram as Ban Ji Deuk
Yang Jae Young as Lee Moon Ki

District Office

Yoon Hee Suk as Jo Doo Jin
Ryu Tae Ho as Choi Jung Woo
Kim Na Yoon as Sung Mi Ra

Tae Seok’s Family

Hong Eun Hee as Kim Hae Joon (Tae Suk’s wife)
Bae Yoon Kyung as Woo Tae Hee (Tae Suk’s younger sister)


Kim Yi Kyung as Kwon Soo Ah
Sul Ji Yoon (설지윤) as Kim Nan Hee (Bae Yeo Wool’s mother)
Kim Jong Goo as congressman
Song Min Hyung as Lee Soo Han
Kim Ki Chun as Seo Jae Geun
Jung Sung Yoon


Ahn Nae Sang as commissioner (ep 3, 5)
Jun Jin Ki as Song Man Soo (ep 7-8)
Kim Dong Won as Song Yoo Jin (ep 7-8)
– Lee Shi Woo (이시우) as Yoo Jin (child)
Lee Yong Joo as Go Joo Sung (ep 11-15)
Shim Eun Woo (심은우) as Jun Joo Yun (ep 12-15)
Lee Jae Yoon as Kang Woo Joon (ep 21-24)
Hwang Suk Jung as Hwang Boo Kyung (ep 24-26)
Hong Seo Joon (홍서준) as Yoo Jung Soo (25-28)
Choi Jong Won as Lee Sung Hak (ep 25-28)
Kim Dan Yool as Lee Dae Woong

Production Credits

Director: Kim Dae Jin, Lee Dong Hyun
Scriptriter: Heo Joon Woo, Kang Yi Hun


Lee Seol was cast for the lead female role after going through auditions involving 300 other contestants.


2018 MBC Drama Awards – Top Excellence Actor (Mon-Tue Drama): Shin Ha Kyun (Less Than Evil)
2018 MBC Drama Awards – Best New Actress: Lee Seol (Less Than Evil)

Episode Ratings

    Nationwide Nationwide Nationwide Nationwide
2018-12-03 1 6.5 - 7.1 (15th) 8.1 (9th)
2018-12-03 2 8.5 - 8.3 (9th) 9.2 (6th)
2018-12-04 3 8.2 - 8.6 (9th) 9.8 (6th)
2018-12-04 4 9.7 - 10.6 (6th) 11.5 (5th)
2018-12-10 5 6.9 - 7.4 (13th) 8.1 (9th)
2018-12-10 6 9.1 - 9.1 (9th) 10.0 (5th)
2018-12-11 7 6.2 - 7.3 (13th) 8.0 (8th)
2018-12-11 8 7.3 - 8.7 (6th) 9.5 (5th)
2018-12-17 9 6.2 - 7.1 (14th) 7.8 (11th)
2018-12-17 10 7.2 - 8.5 (9th) 9.4 (6th)
2018-12-18 11 6.6 - 7.6 (11th) 8.5 (8th)
2018-12-18 12 8.3 - 8.7 (7th) 9.6 (4th)
2018-12-24 13 6.1 - 6.6 (16th) 6.8 (16th)
2018-12-24 14 7.7 - 8.5 (9th) 8.9 (7th)
2018-12-25 15 6.5 - 7.0 (14th) 7.5 (13th)
2018-12-25 16 7.7 - 8.7 (8th) 9.4 (6th)
2019-01-07 17 4.8 - 5.4 6.4 (15th)
2019-01-07 18 5.2 - 5.7 (19th) 6.4 (15th)
2019-01-08 19 5.4 - 5.7 -
2019-01-08 20 5.7 - 5.9 6.5 (20th)
2019-01-14 21 4.7 - 5.6 6.1 (20th)
2019-01-14 22 5.7 - 6.8 (15th) 7.8 (13th)
2019-01-15 23 - - 5.6 6.2 (20th)
2019-01-15 24 - - 6.3 (17th) 6.9 (15th)
2019-01-21 25 4.4 - 5.4 6.2 (18th)
2019-01-21 26 5.5 - 6.5 (17th) 7.1 (15th)
2019-01-22 27 3.6 - 3.9 -
2019-01-22 28 4.3 - 5.0 (17th) 5.3 (17th)
2019-01-28 29 4.8 - 5.7 6.2 (19th)
2019-01-28 30 5.8 - 6.9 (13th) 7.3 (13th)
2019-01-29 31 - - 5.7 (19th) 6.0 (15th)
2019-01-29 32 6.2 - 7.2 (11th) 7.7 (10th)

Sources: TNmS Media Korea & AGB Nielsen Korea

*** Different between TNmS Media Korea & AGB Nielson – Here


Related Photo

(Other Photo from Official Site)

Official Site

Official Trailer
Trailer I
Trailer II
Trailer III
Trailer IV
Trailer V
Trailer VI

Watch Online in Viki.com


  1. 1 : Lucy Says:

    My favourite actor shin ha kyun come back again. This must be a exciting drama.

  2. 2 : Millymi Says:

    Sounds interesting🤔. A female psycopath. I wonder how Lee Seol will portray the character…

  3. 3 : phaiezt Says:

    This is pretty much the Korean version of Luther,
    which is interesting 🙂

  4. 4 : Kdislife Says:

    Love the first 2 Ep 👍🏻 just sooo good 😆

  5. 5 : MaxT Says:

    The first 2 episodes were pretty good.

  6. 6 : Thomas W Says:

    Hong Eun Hee playing the wife is gorgeous.

    “Luther” was a really good British crime drama but the main theme music was what had caught my attention; https://youtu.be/m_Qg1pQSOa0?list=RDm_Qg1pQSOa0

  7. 7 : Thomas W Says:

    I don’t understand why Tae Suk did nothing to eliminate the risk to himself, his (ex)wife and all those the killer snuffed out, by taking out the bad cop who was helping the killer?

    Cops are by dint of their occupation hyper-suspicious and there were several occasions when the bad cop exposed his hand; like when he exposed the witness to the killer.

  8. 8 : Thomas W Says:

    The psycho chick has more balls than Tae Suk is what is wrong with this story.

    In general a man is physically stronger with faster reflexes and more aggressive than a female yet the psycho Eun Sun Jae is demonstrably more competent than our cop hero.

  9. 9 : OK OK OK Says:

    searching for Lee Seol profile – how can she be chosen best actress for this bad detective drama when it has not ends yet. Very funny.
    I don’t like her psycho behavior in this drama….

  10. 10 : FrankC Says:

    Bad script which shows detective is dumb & ex-wife is so stupid to open the door for the killer.

  11. 11 : Sky Light Says:

    Is this a joke or bad script writing???? Jang Hyung-Min falls from a high building, cracks his head it appeared, and ends up in a coma and the wakes up????? How stupid is this??? What the heck. Why doesn’t Tae Seok take him out and evil Choon-Man?? What is with all the cover ups?????

    Sun-Jae is better than Tae Seok and the whole police department. She should have killed him when she had the needle when she was with him. Who would have known????

    Bad script writing.

    The person who is getting revenge for his father being imprisoned on false charges is killing all the wrong people. He needs to kill Choon-Man. And also didn’t Sun-Jae kill the boy’s father that was in prison and he was innocent??? What the heck is this????

  12. 12 : Bearygood Says:

    Is it a good thing that I haven’t started on this drama? I asked myself. After scanning the ratings and your latest comments, I shall skip this drama and surprisingly many more Korean dramas it seems. The ratings the last two months were not encouraging plus viewers comments as well. So how?? Oops never mind! I have my tons of Chinese dramas these days. Thank goodness for the vibrant film industry my boredom is reduced!
    Anyways… what happened to Korean Dramas? The last year was not so interesting! Writers wake Up! Help! The dry spell is eating me up! I can only catch one ‘good’ Kdramas a month! Dearie me!

  13. 13 : Sky Light Says:

    I can’t believe that a serial killer got into Det. Chae’s car???? He saw him in front of the car w/that ugly mask on, why didn’t he lock the car doors, start the car and try to run him over or back up.??????? This is ridiculous.

    None of the cases get closed on this show.

    Tae-Seok needs to tell Yeo Wool that he had to take his sister’s side over yours, sorry and end of story.

  14. 14 : Sky Light Says:

    What???? Jang Hyung Min is alive after the blast??? What is this??????? I think this is ridiculous. What the heck is wrong with the police department and Tae Seok???? Don’t they check the bodies of the two people that were in the car. When Jang stole the car, there was another person in the car. Did they just live them in the blown up car???? Duh!!!!!! This is nonsense.

    Does any one know who the actor is that was a former policeman and got fired, and killed the girls that beat him up???? His name is not listed. He said he had a son which means most likely he was married while he was a policeman and then when he got fired everything fell apart. I have seen him in another drama but can’t remember which one.

    When is Choon Man going to end up in jail the creep cop that he is???

  15. 15 : Rose Says:

    Where is Jang Hyung Min getting all that money that he continues to pay Choon Man?????? Jang never runs out of money!!!! How did he amass all that money????

    I saw Lee Seol in “Lucky You” Korean Magazine. There were other Koran actresses also. This is her first Drama, but she has been in several movies.

  16. 16 : Rose Says:

    Choi Jong-Won who played Lee Sung Hak was very good in his role in Ep. 26 – he admitted to killing several of the tellers.

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