Oh, the Mysterious

Oh, the Mysterious^[2] (Korean: 의문의 일승; RR: Uimunui ilseung; lit. 'Doubtful Victory') is a South Korean television series starring Yoon Kyun-sang and Jung Hye-sung. It aired on SBS from November 27, 2017, to January 30, 2018, on Mondays and Tuesdays at 22:00 (KST) for 40 episodes.^[3]

Oh, the Mysterious
Promotional poster
Also known as	Questionable Start
Hangul	의문의 일승
Lit.	Doubtful Victory
RR	Uimunui ilseung
MR	Ŭimunŭi ilsŭng
Genre	Crime
Written by	Lee Hyun-joo
Directed by	Shin Kyung-soo
Starring	Yoon Kyun-sang Jung Hye-sung
Music by	Kim Soo-jin[1]
Country of origin	South Korea
Original language	Korean
No. of episodes	40
Production
Executive producer	Kim Dong-rae
Camera setup	Single-camera
Running time	35 minutes
Production companies	RaemongRaein Co., Ltd.
Original release
Network	SBS TV
Release	November 27, 2017 (2017-11-27) – January 30, 2018 (2018-01-30)

Synopsis

About a framed escapee turned fake police detective (Yoon Kyun-sang) taking down bad criminals and learns to uncover his true identity.

Cast

Main

• Yoon Kyun-sang as Kim Jong-sam/Oh Il-seung

A framed ex-convict and prison escapee who becomes a fake detective that becomes a part of Metropolitan Investigation Unit. He is smart and fast at what he does while being handsome and firm.^[4]

• Jung Hye-sung as Jin Jin-young

An inspector of the investigation unit who is smart, athletic with an impressive performance record.^[5]

Supporting

Seoul Metropolitan Police Agency

• Kim Hee-won as Park Soo-chil
• Do Ki-seok [ko] as Kim Min-pyo
• Kang Shin-hyo as Kwon Dae-woong
• Choi Won-young as Jang Pil-seong
• Im Hyun-sik as Jo Man-seok

Institute for Future Economics

• Jun Gook-hwan [ko] as Lee Kwang-ho
• Kim Young-pil [ko] as Ahn Tae-jung

Food Company

• Yoon Yoo-sun as Kook Soo-ran
  • Kim Hye-yoon as young Kook Soo-ran
• Park Sung-geun [ko] as Kwak Young-jae
• Oh Seung-hoon as Gi Myeon-jung
• Kim Dong-won as Baek Kyung

Others

• Jang Hyun-sung as Kang Cheol-gi
• Kwon Hwa-woon as Hyeon Jin-gyeom
• Choi Hyo-eun as Kim-ji
• Jeon Sung-woo as Scab
  • Kim Ye-jun as young Scab
• Kim Da-ye [ko] as Cha Eun-bi
  • Ok Ye-rin as Young Cha Eun-bi
• Baek Eun-hye as Nurse
• Jeon Ye-seo as Han Cha-kyung
• Yoon Bok-in as Yoo Kwang-mi
• Choi Dae-hoon as Kim Yoon-soo
• Moon Woo-jin as Han Kang
• Jason Scott Nelson as Drug lord
• Jeon No-min as Jin Jung-gil
• Yoon Na-moo as Song Il-chun

Production

The series is directed by Shin Kyung-soo of Deep Rooted Tree (2011) and Six Flying Dragons (2015) and written by Lee Hyun-joo of School 2013 (2012).^[6]

Original soundtrack

Oh, the Mysterious OST Album
Soundtrack album by Various Artists
Released	2017 (2017)
Genre	Soundtrack
Language	Korean, English
Label	RaemongRaein Co., Ltd. Warner

Part 1

No.	Title	Lyrics	Music	Artist	Length
1.	"Like Rain, Like Music" (비처럼 음악처럼)	Park Sung-sik	Park Sung-sik	Im Do-hyuk	4:02
2.	"Like Rain, Like Music" (Inst.)		Park Sung-sik		4:02
Total length:					8:04

Part 2

No.	Title	Lyrics	Music	Artist	Length
1.	"Doubtful Victory" (의문의 일승)	Park Sung-sik	Park Sung-sik	Soul Dive	3:31
2.	"Doubtful Victory" (Inst.)		Park Sung-sik		3:31
Total length:					7:02

Part 3

No.	Title	Lyrics	Music	Artist	Length
1.	"Not Love" (사랑이 아니라도)	Jung Han-jong	Eom Joo-hyuk	Gyepy	4:16
2.	"Not Love" (Humming Ver.)		Eom Joo-hyuk		4:16
Total length:					8:32

Ratings

• In the table below, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
• NR denotes that the series did not rank in the top 20 daily programs on that date.

Ep.	Original broadcast date	Average audience share
		TNmS[7]		AGB Nielsen[8]
		Nationwide	Seoul	Nationwide	Seoul
2017
1	November 27, 2017	4.1% (NR)	4.5% (NR)	5.0% (NR)[9]	5.4% (NR)
2		5.2% (NR)	5.7% (NR)	5.4% (NR)[9]	6.0% (NR)
3	November 28, 2017[10]	4.0% (NR)	4.2% (NR)	4.5% (NR)[9]	4.7% (NR)
4		4.2% (NR)	4.3% (NR)	4.9% (NR)[9]	5.0% (NR)
5	December 4, 2017[11]	5.8% (NR)	6.7% (NR)	6.9% (NR)	8.0% (14th)
6		6.4% (NR)	7.3% (16th)	7.6% (16th)	8.4% (16th)
7	December 5, 2017[12]	5.8% (NR)	5.8% (20th)	6.6% (19th)	7.5% (15th)
8		6.6% (17th)	6.2% (18th)	7.5% (13th)	8.2% (9th)
9	December 11, 2017	5.4% (NR)	5.7% (NR)	6.4% (NR)	6.6% (NR)
10		6.3% (NR)	6.6% (20th)	7.8% (18th)	9.3% (10th)
11	December 12, 2017	5.5% (NR)	6.2% (18th)	6.6% (19th)	7.0% (18th)
12		5.7% (NR)	6.2% (16th)	7.7% (14th)	8.2% (10th)
13	December 18, 2017	5.2% (NR)	5.9% (NR)	6.6% (NR)	7.3% (19th)
14		5.8% (NR)	6.4% (NR)	7.3% (19th)	7.9% (14th)
15	December 19, 2017	5.6% (NR)	6.2% (15th)	6.7% (19th)	7.5% (17th)
16		5.7% (NR)	5.9% (17th)	7.6% (15th)	8.4% (8th)
17	December 25, 2017[13]	4.3% (NR)	4.4% (NR)	5.7% (NR)	5.8% (NR)
18		5.6% (NR)	6.0% (NR)	7.1% (NR)	7.6% (15th)
19	December 26, 2017[14]	5.5% (NR)	6.1% (NR)	5.6% (NR)	6.2% (19th)
20		6.0% (NR)	6.6% (NR)	6.3% (17th)	6.9% (16th)
2018
21	January 1, 2018	4.8% (NR)	5.2%	5.5% (NR)	5.9% (NR)
22		5.8% (NR)	6.1%	6.3% (NR)	6.6% (NR)
23	January 2, 2018	5.2% (NR)	5.9%	6.0% (NR)	6.8% (17th)
24		5.6% (NR)	6.2%	6.5% (17th)	7.1% (16th)
25	January 8, 2018	4.7% (NR)	5.6%	5.8% (NR)	6.7% (NR)
26		5.3% (NR)	6.0%	6.2% (NR)	6.9% (18th)
27	January 9, 2018	5.1% (NR)	6.2%	6.6% (NR)	7.6% (17th)
28		5.3% (NR)	6.4%	6.9% (19th)	7.8% (15th)
29	January 15, 2018	4.9% (NR)	5.0%	5.2% (NR)	5.7% (NR)
30		5.2% (NR)	5.4%	5.7% (NR)	5.8% (NR)
31	January 16, 2018	5.0% (NR)	5.3%	5.5% (NR)	5.7% (NR)
32		5.5% (NR)	6.5%	6.4% (NR)	7.3% (15th)
33	January 22, 2018	5.5% (NR)	6.1%	6.6% (NR)	7.2% (18th)
34		6.4% (NR)	6.9%	7.7% (16th)	8.2% (11th)
35	January 23, 2018	6.5% (19th)	7.1%	7.7% (13th)	8.3% (10th)
36		6.9% (18th)	7.4%	8.5% (12th)	9.1% (8th)
37	January 29, 2018	6.5% (NR)	7.0%	7.1% (18th)	7.7% (15th)
38		6.9% (NR)	7.3%	8.1% (14th)	8.5% (14th)
39	January 30, 2018	6.9% (15th)	7.6%	7.7% (12th)	8.5% (8th)
40		8.2% (11th)	8.9%	9.0% (8th)	9.8% (6th)
Average		5.6%	6.1%	6.6%	7.2%

Awards and nominations

Year	Award	Category	Nominee	Result	Ref.
2017	25th SBS Drama Awards	Top Excellence Award, Actor in a Monday–Tuesday Drama	Yoon Kyun-sang	Nominated
		Excellence Award, Actress in a Monday–Tuesday Drama	Jung Hye-sung	Nominated
2018	11th Korea Drama Awards	Best New Actress		Nominated	[15]

International broadcast

• In Singapore and Malaysia, the series aired within 24 hours after its original South Korean broadcast on Sony One under the title Doubtful Victory.^[16]