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Big Mouth Season 1

Big Mouth Season 1


After being defrauded, Chang-ho, who lost his property and was in the midst of a divorce crisis, received a phone call from the mayor of Jiucheon, Choi Do-ha, asking him to undertake a case involving a heavyweight. But things are not so simple. In the hospital to wake up, Chang-ho has become a rat in the mouth of everyone and, because of suspected drug abuse, is about to be put in prison. Ji-hoon and Mi-ho work hard to restore Chang-ho's innocence.

air date

July. 29,2022


Oh Choong-hwan


Kim Ha-ram

production companies

Studio Dragon, AStory

Where to Watch Big Mouth Season 1

Season 1
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Big Mouth Season 1 is not available to rent or buy online.

Big Mouth Season 1 is not available to watch for free.

Big Mouth Season 1 Episode Guide

Episode 1

S1 E1 Episode 1

Jul. 29,2022

Chang-ho, who has no money and is about to lose his wife, receives a call from the mayor of Gucheon.

Episode 2

S1 E2 Episode 2

Jul. 30,2022

Chang-ho is charged with drug abuse and locked up in Gucheon Prison.

Episode 3

S1 E3 Episode 3

Aug. 05,2022

Who made Changho, Big Mouse, and why? However, he needs to be recognized as such to protect Miho.

Episode 4

S1 E4 Episode 4

Aug. 06,2022

Is Changho really Big Mouse? Gong Jihoon makes a bet with Changho to find out his true identity.

Episode 5

S1 E5 Episode 5

Aug. 12,2022

Jihoon approaches Miho to find Seo Jaeyoung's thesis. Does Miho know Changho's true identity?

Episode 6

S1 E6 Episode 6

Aug. 13,2022

Has Changho been lying to Miho? Miho joins the prison medical volunteer program to meet Changho.

Episode 7

S1 E7 Episode 7

Aug. 19,2022

Jaeho warns Changho to stop looking into Seo Jaeyoung's thesis. Miho is suddenly attacked.

Episode 8

S1 E8 Episode 8

Aug. 20,2022

Changho is in a mental hospital. Will Changho be able to hide his identity in a state of confusion?

Episode 9

S1 E9 Episode 9

Aug. 26,2022

Changho stands as an informant in Seo Jaeyoung's trial, and Jihoon and Jungrak search for Changho.

Episode 10

S1 E10 Episode 10

Aug. 27,2022

Changho calls out Big Mouse, and they respond. An unexpected character turns up at the agreed time.

Episode 11

S1 E11 Episode 11

Sep. 02,2022

Changho shifts the power dynamics in the prison to pressure Big Mouse. Doha plants a new warden.

Episode 12

S1 E12 Episode 12

Sep. 03,2022

The warden plans to use the prison riots to take out Changho and Miho.

Episode 13

S1 E13 Episode 13

Sep. 09,2022

The hot-plate restaurant is in ruins. The agitated Changho meets someone unexpected there.

Episode 14

S1 E14 Episode 14

Sep. 10,2022

Changho makes a tempting offer to Chairman Kang. Doha conspires with Yoongab to get rid of Changho.

Episode 15

S1 E15 Episode 15

Sep. 16,2022

Changho prepares for the full-fledged elections against Doha, but Miho's health is in trouble.

Episode 16

S1 E16 Episode 16

Sep. 17,2022

The TV debate begins, and Miho almost has the smoking gun that will bring down Choi Doha.

More Episodes

Cast of Big Mouth Season 1

Lee Jong-suk

Park Chang-ho


Ko Mi-ho

Yang Kyung-won

Gong Ji Hoon

Kim Joo-heon

Choi Do Ha

Kwak Dong-yeon


Ok Ja-yeon

Hyun Joo Hee

Lee Ki-young

Go Gi-Gwang

Oh Eui-shik

Kim Soon-Tae

Lee Seung-Hyung

Chairman Kang's secretary

Kim Jeong-hyeon

Jung Chae Bong