Kim Nam Gil as Kim Hae Il
Kim Sung Kyun as Goo Dae Young
Lee Ha Nui as Park Kyung Sun
Go Joon as Hwang Jung Bum
Geum Sae Rok as Seo Seung Ah

People at the Cathedral

Jeong Dong Hwan as Lee Young Joon
Jun Sung Woo as Han Sung Kyu
Baek Ji Won as Kim In Kyung
Ahn Chang Hwan as 쏭삭 테카라타나푸라서트
Ko Kyu Pil as Oh Yo Han
Yoon Joo Hee as Bae Hee Jung

People around the main characters

Jung Young Joo as Jung Dong Ja
Kim Hyung Mook as Kang Seok Tae
Jung In Gi as Nam Suk Goo
Han Gi Jung as Park Won Moo
Lee Moon Sik as Ki Yong Moon
Kim Won Hae as Vladimir Gojayev

People at the Police Station

Shin Dam Soo as Lee Myung Soo
Jeon Jeong Kwan as Heo Lig Goo
Ji Chan as Na Dae Kil

Others

Kim Min Jae as Lee Jung Kwon
Lee Je Yeon as Kim Hoon Suk
Eum Moon Suk as Jang Ryong