The WORST episodes of Undercover (KR)

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

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: 1/31/2026Network: JTBCStatus: Ended

7.78

9 votes

#1 - 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.

7.88

8 votes

#2 - 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.

7.89

9 votes

#3 - 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.

7.90

10 votes

#4 - 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.

Watch Now:Amazon

7.92

12 votes

#5 - 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.

8.00

8 votes

#6 - 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.

8.08

12 votes

#7 - 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"

8.10

10 votes

#8 - 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.

Watch Now:Amazon

8.27

15 votes

#9 - 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.

Watch Now:Amazon

8.28

18 votes

#10 - 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.

8.29

7 votes

#11 - 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.

8.29

7 votes

#12 - 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.

8.33

6 votes

#13 - 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.

Watch Now:Amazon

8.43

7 votes

#14 - 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.

8.50

6 votes

#15 - 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.

Watch Now:Amazon

8.57

7 votes

#16 - 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.