The BEST episodes of Undercover (KR) season 1

Every episode of Undercover (KR) season 1, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Undercover (KR) season 1!

A longtime intelligence agent hides his true identity from his wife, a human rights lawyer newly appointed to lead a justice agency. As they confront powerful forces and uncover buried truths, their marriage is put to the ultimate test.

Last Updated: 10/24/2025Network: JTBCStatus: Ended

8.57

7 votes

#1 - Episode 11

Season 1 - Episode 11 - Aired 5/28/2021

The truth behind the Cha Min-ho and Park Du-sik cases is revealed, and Yun-ju wishes to meet Yeon-su to tell her a surprising truth.

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8.50

6 votes

#2 - Episode 14

Season 1 - Episode 14 - Aired 6/5/2021

Jeong-hyeon is knocked out and abducted, while Yeon-su receives a recording with information about that fateful day in 1991.

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8.43

7 votes

#3 - Episode 16

Season 1 - Episode 16 - Aired 6/12/2021

Yeon-su and Jeong-hyeon are faced with grave danger as Yeon-su is taken hostage by Hyeong-rak.

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8.33

6 votes

#4 - Episode 13

Season 1 - Episode 13 - Aired 6/4/2021

Yeon-su discovers that Park Won-jong was embezzling funds, and Won-jong steals Hyeong-rak's tablet PC to side with Yeon-su.

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8.29

7 votes

#5 - Episode 12

Season 1 - Episode 12 - Aired 5/29/2021

Yeon-su learns Jeong-hyeon's true identity, while the Corruption Investigation Office becomes suspicious of Yeong-geol and Park Won-jong.

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8.29

7 votes

#6 - Episode 15

Season 1 - Episode 15 - Aired 6/11/2021

Yeon-su increases her efforts to bring in Hyeong-rak, while Jeong-hyeon infiltrates the National Intelligence Service.

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8.28

18 votes

#7 - Episode 1

Season 1 - Episode 1 - Aired 4/23/2021

Jeong-hyeon and Yeon-su are faced with an uncomfortable feeling as they both work hard to live an ordinary life of raising their autistic son.

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8.27

15 votes

#8 - Episode 2

Season 1 - Episode 2 - Aired 4/24/2021

Jeong-hyeon must lie to protect Yeon-su while she becomes involved in a potentially dangerous case.

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8.10

10 votes

#9 - Episode 6

Season 1 - Episode 6 - Aired 5/8/2021

Yeon-su risks her appointment to take responsibility for the situation, and Jeong-hyeon rushes to help her when he finds out she is in trouble.

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8.08

12 votes

#10 - Episode 4

Season 1 - Episode 4 - Aired 5/1/2021

Seung-gu's assault speculations risks Yeon-su's appointment, and Jeong-hyeon looks into "Project Deep-Pockets"

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8.00

8 votes

#11 - Episode 10

Season 1 - Episode 10 - Aired 5/22/2021

Yeon-su grows suspicious of Jeong-hyeon, and Yeong-geol realizes that Jeong-hyeon has been spying on him.

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7.92

12 votes

#12 - Episode 3

Season 1 - Episode 3 - Aired 4/30/2021

Seung-gu is targeted as Hyeong-rak conspires against Yeon-su to prevent her appointment, while a letter arrives from the late Cha Min-ho.

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7.90

10 votes

#13 - Episode 5

Season 1 - Episode 5 - Aired 5/7/2021

Jeong-hyeon uses Yeong-geol to uncover the truth behind "Project Deep-Pockets," while a whistleblower causes chaos at Yeon-su's appointment hearing.

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7.89

9 votes

#14 - Episode 7

Season 1 - Episode 7 - Aired 5/14/2021

Yeon-su is forced to investigate Kim Myeong-jae, while Hyeong-rak and Yeong-geol are watching her every move.

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7.88

8 votes

#15 - Episode 9

Season 1 - Episode 9 - Aired 5/21/2021

Yeon-su tries her best to retrieve evidence about the Kim Myeong-jae case, and Jeong-hyeon is framed for murder and goes on the run.

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7.78

9 votes

#16 - Episode 8

Season 1 - Episode 8 - Aired 5/15/2021

Yeon-su declares that Kim Myeong-jae is innocent, and Jeong-hyeon is contacted by Kim Tae-yeol's murderer, Park Du-sik.

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