Characters played by Lee Seung-gi
Jung Ba Reum
Characters played by Lee Hee-joon
Go Moo Chi
Characters played by Park Ju-hyun
Oh Bong Yi
Characters played by Soo-jin Kyung
Choi Hong Ju
Characters played by Bong-sik Hyun
Detective Bok Ho Nam
Characters played by Ji-Hoon Pyo
Detective Shin Sang
Characters played by Ji-hyeon Woo
Koo Dong Koo
Characters played by Yoon Seo Hyun
Detective Kang Ki Hyeok
Characters played by Hwa-Woon Kwon
Sung Yo Han
Characters played by Ahn Nae-sang
Detective Park Du Seok
Characters played by Jo Jae-yoon
Daniel Lee
Characters played by Kim Jung-nan
Sung Ji Eun
Characters played by Mal-Geum Kang
Ba Reum's aunt
Characters played by Kang-Hoon Kim
Jae Hoon
Characters played by Seo-Joon Lee
Na Chi Kook
Characters played by Chun Jung-Ha
Na Chi Kook's mother
Characters played by Kim Min-Soo
Detective Lee Min Soo
Characters played by Jae-wook Ahn
Han Seo Jun
Characters played by Eun-pyo Jeong
Kang Duk Soo
Characters played by Jung Ae-ri
Choi Young Shin
Characters played by Yeong-jae Kim
Go Moo Won
Characters played by Kim Young-ok
Bong Yi's grandmother
Characters played by Seok-yong Jeong
Woo Jae Pil
Characters played by So-yi Park
Kim Hyun Soo
Characters played by Min-Kyeong Kim
Song Soo Jung's mother
Characters played by Cherish Maningat
Kim Han Kook's mother
Characters played by Kim Hye-Yeon
Kim Han Kook
Characters played by Lee Do-Hyung
Ba Reum's uncle
Characters played by Lee Chae-Hyun
Hoon Suk
Characters played by Son Woo-Hyun
Kim Joon Sung
Characters played by Song Boo-gun
Song Soo Ho
Characters played by Jae-hee Song
Attorney Woo Hyung Chul
Characters played by Ha-bok Yu
Shin Sung Min
Characters played by Hyeok-soo Kwon
Doctor
Characters played by Kwon Ye-Eun
Yu Na
Characters played by Se-On Hwang
Kim Da Seul
Characters played by Kim Moon-Ho
Lee Jae Shik
Characters played by Yun-Sook Shin
Kang Duk Soo's mother
Characters played by Choi Sol-Hee
Yu Na's mother
Characters played by Jang Yong-Chul
Kim Bong Cheol
Characters played by Hong Eun-Jeong
Seul Ki
Characters played by Yeon-ho Jo
Go Moo Won (young)
Characters played by Ye-rim Joo
Oh Bong Yi (young)
Characters played by Garrison Michael Farquharson-Keener
Doctor Fallon
Characters played by Seo Woo-Jin
Jae Hoon (5 Years old)
Characters played by Song Min-Jae
Go Moo Chi (Child)
Characters played by Shin Ha-Young
Song Soo Jung
Characters played by Min-ho Kwak
Prisoner
Characters played by Byun Yoon-Jeong
Mrs. Oh
Characters played by Kang Ro-chae
Park Hye Won
Characters played by Park Gi-ryoong
OBN News Chief
Characters played by Woo Jin Kim
Police Officer Kim
Characters played by Sung-Kyung Kim
Fact Check host
Characters played by Eon-jeong Lee
Ba Reum's mother
Characters played by Eun-yeong Park
Staffing Agency Woman
Characters played by Kim Young-joo
Sherlock Hong Ju Staff
Characters played by Choi Yoon-Bum
Officer Nam
Characters played by Song In-Seob
Prison Doctor
Characters played by Shim Yu-Seung
Sherlock Hong Ju staff
Characters played by Wan-gi Jo
Reporter Yang
Characters played by Bo Ra-na
Hostess bar manager
Characters played by Seon Ah Rin
Jo Mi-Jung
Characters played by Bae Sung-il
Detective Interviewing Jae Hoon
Characters played by Ha-neul Kim
Jung Soo Jin
Characters played by Kim Yo-han
[no data]
Characters played by Kim Soo-In
Mystery Girl
Characters played by Yong-nyeo Lee
Grandmother
Characters played by Seo Jung-Yeon
Go Moo Chi's mother
Characters played by Kim Bi-bi
Nun
Characters played by Na-Eun Go
Jennifer
Characters played by Park Hye-Na
Byun Soon Young
Characters played by Dong-hyun Seo
Go Moo Chi (teen)
Characters played by Kang-hee Jung
Go Moo Chi's father
Characters played by Seo Yoon-Hyuk
Woo Hyung Chul (young)
Characters played by Lee Jae-Eun
Koo Dong Koo's Mom
Characters played by Eoin Stanley
Doctor
Characters played by Joo Ah Kim
Orphanage Employee
Characters played by Ha Seung-Youn
Angela
Characters played by Jae-Kwon Jang
Second Male Talk Show Guest
Characters played by Shin Hee-Gook
Koo Dong Koo's friend
Characters played by Yoo-Yong
Sisters Killer
Characters played by Min Eung-Shik
Shin Jae Hyung
Characters played by Kim Mi-Hye
Jae Hoon's teacher
Characters played by Kim Hyo-Gyeong
Byun Min Ji
Characters played by Kim Yeon Hee
Grocery Store Employee
Characters played by Kim Young-Sun
Science teacher
Characters played by Jang Eui-Don
Attorney Hwang
Characters played by Chang-Hyun Han
Government Employee
Characters played by Min Jung-Sup
Han Soo Chul
Characters played by Park Jae Wan
Police Commissioner
Characters played by Sung Chan-Ho
Government official
Characters played by Choi Yi-Sun
Motorcycle Deliveryman
Characters played by Kang Chan-yang
Nurse
Characters played by Seo Min-Seong
Prison Officer Kim
Characters played by Kim Sung Joon
Myung Ko Nam
Characters played by Kang Moon-Kyung
President
Characters played by Ja-Ryeong Lee
Kim Woo Seon
Characters played by Kim Ah-Ram
Sung Ji Eun's employee
Characters played by Oh Ji-Young
Female Talk Show Guest
Characters played by Uhm Hye Soo
Police Officer
Characters played by Moon Hak-Jin
Parole officer
Characters played by Bok-Sung Yoon
Jung Joong Suk
Characters played by Im Yu-Ran
Witness
Characters played by Park Hyun-Jeong
Kim Young Hee
Characters played by Shin Soo-Hyeon
Michaela
Characters played by Jung Nan-Hee
Teacher
Characters played by Park Yong
Kim Ji-Wan
Characters played by Kim Ji-Su
Park Hye Won's friend
Characters played by Yoon-jae Ji
Kim Byung Tae
Characters played by Kang Suk-Won
Male Talk Show Guest
Characters played by Ko Eun-Bi
Angela (child)
Characters played by Yeon Yoo
Woo Hyung Chul's mother
Characters played by Ahn Seo-Yeon
Jae Hee
Characters played by Yang Ha-Yoon
Min Jung
Characters played by Brad Curtin
Doctor Gary
Characters played by Kim Dong-Ha
Jae Min
Characters played by Oh Min-Joon
Bully
Characters played by Ro-sa Kim
Student's Mother
Characters played by Kim Gyeol
Jae Hoon's father
Characters played by Dong-yup Sin
Self