18. Episode 18 (2018)
As O-gong prepares to sacrifice himself in place of Seon-mi, Devil King Woo, feeling sorry for both, tries to solve the mystery behind the Geumganggo.
Release date: 2018-02-25
Season number: 1
Episode number: 18
Runtime: 76 minutes
Cast
Lee Seung-gi
as Son O-gong
Cha Seung-won
as Devil King Woo / Woo Hwi
Oh Yeon-seo
as Jin Seon-mi / Samjang
Lee Hong-gi
as Jeo Pal-kye / PK
Jang Kwang
as Sa O-jeong / Yun Dae-shik
Lee El
as Ms. Ma Ji-young
Lee Se-young
as Jung Se-ra / Richie / Zombie / Asanyeo
Kim Seung-o
as Lee Han-ju
Sung Hyuk
as General Winter / Summer Fairy
Yoon Bo-ra
as Alice / Jade Dragon
Sung Ji-ru
as Master Subori
Jung Jae-won
as Hong Hae-a
Kal So-won
as Jin Seon-mi (Young)
Song Jong-ho
as Kang Dae-seong
Kim Ji-soo
as Na Chal-nyeo / Ja-eun
Michael K. Lee
as Jonathan