Most Unlikable Characters

Choi Min Shik as Jang Gyung Chul

Choi Young Joon as Lieutenant General Gato

Jo Sung Ha as  Baek Jung Ki
Jung Hae Kyun as I’m Joo Ho [Sang Mi's father]

Oh Man Suk as Jo Chul Gang [Lieutenant commander]

Yoo Yeon Seok as Geum Hyuk Soo

Bona as Go Yu Rim

Nam Joo Hyuk as Nam Do San

Seo Yea Ji as Go Mun Young

Kim Yeo Jin as Choi Myung Hee

Jeon Do Yeon as Nam Haeng Seon

Jung Eugene as Jin Yoo Hee

Chae Sang Woo as Gi Oh Sung

Kim Jung Young as Ji Seol Young [In Ho's ex-wife]

Lee Hee Joon as Ko Moo Chi

Jung Won Chang as Bae Seok Chan

Jo Yoon Seo as Bang Eun Joo

Jo Han Sun as Bale

Seo Hyun Woo as Lee Sung Jo

Jung Yi Seo as Seon Yeo Ok

Yoon Je Moon as Han Taek Soo

Wi Ha Joon as Do Shik

Choi Yoo Hwa as Han Na Rae [Professor]

Yoon Gyung Ho as Hwang Min Gu [Detective]

Roh Yoon Seo as Bang Young Joo

Bae Hyun Sung as Jung Hyun

S1, S2, S3:

Song Ji In as A Mi

Lee Min Young as Song Won

Lim Hye Young as Nam Ga Bin

Sung Hoon as Pan Sa Hun

Jeon Noh Min as Park Hae Ryoon

Lee Tae Gon as Shin Yoo Shin

Jeon Soo Kyung as Lee Shi Eun

Lee Jong Nam as So Ye Jung

Oh Seung Ah as Lee Yeon Hui (Ep. 1)

Kim Bo Yun as Kim Dong Mi 

Kim Byung Chul as Park Joong Hun [Goryeo eunuch]

Lee Mi Sook as Mo Seul Hee [Man Dae's girlfriend]

Park Ji Ah as Jeong Mi Hee [Moon Dong Eun's mother]