- Park So-yi - Young Choi Hong-joo
- Lee Eon-jeong - Pregnant Lady
- Suh Dong-hyun - Teenage Go Moo-chi
- Jo Yeon-ho - Young Go Moo-won
- Seo Jeong-yeon - Go Moo-chi's Mother
- Jeong Kang-hee - Go Moo-chi's Dad
- Kim Yeong-ok - Oh Bong-yi's Grandmother
- Joo Ye-rim - Young Oh Bong-yi
- ??? - Han Seo-jun
- ??? - Sung Ji-eun
- Kim Kang-hoon - Young Jae-hoon
- Kim Kyeol - Jae-hoon's Father
- Kim Dong-ha - Jae Min
- Ahn Seo-Yeon - Jae Hee
- Seo Woo-jin - Young Jae-hoon
- Son Woo-hyeon - Kim Joon Sung
- Jang Ui-don - Attorney Hwang
- ??? - Bok Ho-nam
- Yoon Seo-hyun - Kang Ki-Hyeok
- Pyo Ji-hoon - Shin Sang
- Jeong Seok-yong - Woo Jae-pil
- Bae Seong-il - Detective Interviewing Jae Hoon
- Park Jae-wan - Police Commissioner
- Ha Yeong - Song Soo-jung
- Kang Mal-geum - Jung Ba-Reum's Aunt
- Lee Do-Hyung - Jung Ba-Reum's Uncle
- Song Min-jae - Young Go Mu-chi
- Song Boo-gun - Song Soo-ho
- ??? - Choi Young-shin
- ??? - Shin Jae-hyung
- Park Yong - Kim Ji-wan
- Lee Ja-ryeong - Kim Woo-seon
- Kang Moon-kyung - President
- Sung Chan-ho - Government Official
- Kim Ha-eon - Kim Han-kook
- Cherish Maningat - Kim Han-Kook's Mother
- Park Eun-young - Staffing Agency Woman
- ??? - Kang Duk Soo
- Kim Mi-hye - Jae-hoon's Teacher
- Song In-seop - Prison Doctor
- Kwak Min-ho - Prisoner
- Kim Ro-sa - Student's Mom
- Kang Suk-won - Male Talk Show Guest
- Oh Ji-young - Female Talk Show Guest
- ??? - Park Du-seok
- Kim Min-kyung - Song Soo-jung's Mother
- Lee Seo-jun - Na Chi Kook
- Park Hye Na - Byun Soon-Young
- Park Ki-ryung - OBN News Chief
- Eom Hye-soo - Police Officer
- Kim Joo-ah - Orphanage Employee
- Chae Yeon Hee - Grocery Store Employee
- Kim Hyo-gyeong - Byun Min-Ji
- Byun Yun-jeong - Mrs. Oh
- Shim Yoo-Seung - Sherlock Hong-Ju staff
- ??? - Fact Check host
- Cho Wan-ki - Reporter Yang
- Oh Min-joon - Bully
- Choi Yi-sun - [Motorcycle deliveryman]
- Han Chang-hyun - Government Employee
- ??? - Jung Soo-jin
- Sung Chi-wook
- Kang Cheol-Woo
- Choi Joon-bae
- ??
Lee Seung-gi hace el papel de Jung Ba-reum.
Lee Hee-jun interpreta a Go Moo-chi en la serie.
??? interpreta a Oh Bong-yi en la serie.
??? interpreta a Sung Yo-han en la serie.
??? hace el papel de Choi Hong-ju.
Woo Ji-hyeon interpreta a Koo Dong-koo en la serie.
Jo Jae-yun hace el papel de Daniel Lee.
??? interpreta a Go Moo-won en la serie.
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