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Doubtful Victory

Title: 의문의 일승 / Doubtful Victory
Also known as: Questionable Start / Oh, the Mysterious
Chinese Title: 疑問的一勝
Genre: Thriller, Crime
Episodes: 40 (35 minutes/episode)
Broadcast network: SBS
Broadcast period: 2017-Nov-27 to 2018-Jan-30
Air time: Monday & Tuesday at 22:00 (2 episodes back-to-back)


This drama is about a fake detective punishing villains and discovering who he really is.

Oh Il Seung (Yoon Kyun Sang) was wrongly accused of a crime and imprisoned, and has spent ten years on death row. He manages to break out of prison and somehow becomes a fake cop, then sets out to find a hidden stash of 100 billion won (nearly 100 million dollars) on behalf of criminals who will supply him with a new identity upon receipt. He has three days to find the cash and begin his new life. Meanwhile, Jin Jin Young (Jung Hye Sung) is a detective. She became a detective to reveal the truth behind her father’s death.


Main Cast

Yoon Kyun Sang as Oh Il Seung
Jung Hye Sung as Jin Jin Young

Seoul Metropolitan Police Agency (Division of Crime Investigation, Division for Male and Female Crime)

Kim Hee Won as Park Soo Chil
Do Ki Suk as Kim Min Pyo
Kang Shin Hyo as Kwon Dae Woong
Choi Won Young as Jang Pil Sung
Im Hyun Sik as Cho Man Suk

Institute for Future Economics

Jun Gook Hwan as Lee Kwang Ho
Kim Young Pil as Ahn Tae Jeong

Food Company

Yoon Yoo Sun as Gook Soo Ran
Park Sung Geun as Kwak Young Jae
Oh Seung Hoon as Ki Myun Joong
Kim Dong Won (김동원) as Park Young


Jang Hyun Sung as Kang Chul Ki
Jun Sung Woo as Tttagji
Kim Da Ye as Cha Eun Bi
Ok Ye Rin as Eun Bi (child)
Jun Ye Seo as Han cha Kyung
Yoon Bok In Yoo Kwang Mi
Choi Dae Hoon as Kim Yoon Soo
Moon Woo Jin as Han Kang
Jun Noh Min as Jin Jeong Kil
Yoon Na Moo as Song Il Choon
Lee Sang Yi as Lee Kyung Jae
Kwon Hwa Woon as Hyun Jin Gyeom
Yoon Ji Min as Madame Hong
Lee Nam Hee as Cha Kwang Tae (Lee Kwang Ho’s ex-butler)
Lee Seo Hwan as prison officer

Production Credits

Director: Shin Kyung Soo
Screenwriter: Lee Hyun Joo

Episode Ratings

2017-12-0455.8-6.98.0 (16th)
2017-12-0466.47.3 (16th)7.6 (16th)8.4 (14th)
2017-12-0575.85.8 (20th)6.6 (19th)7.5 (15th)
2017-12-0586.6 (17th)6.2 (18th)7.5 (13th)8.2 (9th)
2017-12-11106.36.6 (20th)7.8 (18th)9.3 (10th)
2017-12-12115.56.2 (18th)6.6 (19th)7.0 (18th)
2017-12-12125.76.2 (16th)7.7 (14th)9.2 (10th)
2017-12-18135. (19th)
2017-12-18145.86.47.3 (19th)7.9 (14th)
2017-12-19155.66.2 (15th)6.7 (19th)7.5 (17th)
2017-12-19165.75.9 (17th)7.6 (15th)8.4 (8th)
2017-12-25185. (15th)
2017-12-26195. (19th)
2017-12-26206.06.66.3 (17th)6.9 (16th)
2018-01-02235. (17th)
2018-01-02245.66.26.5 (17th)7.1 (16th)
2018-01-08265. (18th)
2018-01-09275. (17th)
2018-01-09285.36.46.9 (19th)7.8 (15th)
2018-01-16325. (15th)
2018-01-22335. (18th)
2018-01-22346.46.97.7 (16th)8.2 (11th)
2018-01-23356.57.17.7 (13th)8.3 (10th)
2018-01-23366.97.48.5 (12th)9.1 (8th)
2018-01-29376.57.07.1 (18th)7.7 (15th)
2018-01-29386.97.38.1 (14th)8.5 (14th)
2018-01-30396.9-7.7 (12th)8.5 (8th)
2018-01-30408.2-9.0 (8th)9.8 (6th)

Sources: TNmS Media Korea & AGB Nielsen Korea

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


Official Site

Official Trailer
Trailer I
Trailer II

Watch Online in Viki.com


  1. 1 : Sanjinyeon Says:

    Im excited to see the chemistry of Yoon Kyung Sang and Jung Hye Sung…

  2. 2 : Pinoy Tambayan Says:

    The Pinoy fans of teleseryes have increased immensely as the Pinoy TV networks made these shows accessible to Filipinos abroad.

  3. 3 : tigerb Says:

    i’d watch this because of yks, and i think he would work well with the female lead. we’ll see if they don’t disappoint.

  4. 4 : OK OK OK Says:

    I will put on my watching list because I love crime & detective story. Sure won’t be bored. ha ha 😛
    Most importantly, these 2 leads I like…. their acting and face…

  5. 5 : Sanjinyeon Says:

    From traditional costume in Rebel to prison uniform here which is better? It is better to wait and see how Yoon Kyung Sang will showcase his talent as an actor in his new character, for sure I will love it.

  6. 6 : Kegrev Says:

    Atlast!! Jung Hye Sung main role…

  7. 7 : sanjinyeon Says:

    Daebak! the 4 episodes are really interesting the twist and turn of the story is so good. Yun Kyung Sang is such a cute and adorable actor in any angle of the camera, when I first saw him in Rebel he captured my heart thru his acting, I cried and laugh watching him. Even Jung Hye Sung I like her since Chief Kim and from then I love to watch her in a kdrama. The two boy who played young Kim Jong Sam and his friend are amazing their acting are great. I’m happy watching this kdrama and can’t wait for every new episode.

  8. 8 : OK OK OK Says:

    I have watched till episode 8, so far I am enjoying it. 😛

  9. 9 : Alvin Says:

    I have watched 2 episodes so far and I am really loving it. Very nice and interesting, and fresh break from the usual love/romance or court case dramas I have been watching in the past few months.

  10. 10 : Florence Djoenaidy Says:

    awalnya bisa dikatakan ceritanya menarik. tapi makin kesananya makin membosankan, terlalu lambat n berputar2. so bored.

  11. 11 : harshi Says:

    I’m totally loving this “kim prosecutor” character.and the actor is doing a really good job too.

  12. 12 : OK OK OK Says:

    40 episodes x half hour = 20 episodes is too long for this drama.
    at first quite interesting but take very long to nail down the badie – too long winded. I thought of giving up but struggle to continue watching episode 30 onwards…….. I will try to finish the last 4 episodes 37 to 40.

  13. 13 : Bread lover Says:

    Boring drama. Why? Repeatitive story line villain try to kill Kim Jong Sam then villain save him. It kept on repeating…

  14. 14 : Eve Says:

    Love this drama. Everything fine. Love the lead male and female actors.

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