Pemeran Blood Free

Ju Ji Hoon (주지훈)

as Woo Chae Un

Pemeran Utama

Han Hyo Joo

as Yun Ja Yu

Pemeran Utama

Lee Hee Jun (이희준)

as Seon U Jae

Pemeran Utama

Lee Moo Saeng

as On San

Pemeran Utama

Park Ji Yeon

as Jung Hae Deun

Pemeran Utama

Jeon Seok Ho

as Seo Hui [Research team 1’s head]

Pemeran Pembantu

Kim Sang Ho

as Kim Sin Gu [Biotech doctor]

Pemeran Pembantu

Yi Seo

as Hong Sae Ip [Researcher]

Pemeran Pembantu

Yook Hyun Suk

as [U Jae’s secretary]

Pemeran Pembantu

Um Hyo Sup

as Seon U Geun [U Jae's father]

Pemeran Pembantu

Jeon Gook Hwan

as Lee Mun Gyu

Pemeran Pembantu

Kang Ian

as Kim Ho Seung

Pemeran Pembantu

Lee Ji Hyuk

as Han Gi Ho (Ep. 1)

Bintang Tamu

Kim Jin Goo

as Park Dae Seong (Ep. 1)

Bintang Tamu

Seo Myung Chan

as Lee Nam Jin [Chairman] (Ep. 1)

Bintang Tamu

Han Yu Eun

as [CM model] (Ep. 1)

Bintang Tamu

Son Kang Gook

as [Newspaper director] (Ep. 1)

Bintang Tamu

Jang Eui Don

as [Colonel] (Ep. 2)

Bintang Tamu

Yoon Joo Man

as [Black suit man] (Ep. 2)

Bintang Tamu

Kim Won Seok

as [Detective] (Ep. 2-3)

Bintang Tamu

Lee Sung Woo

as [Labor broker] (Ep. 3-4)

Bintang Tamu

Kang Jung Woo

as [Police officer] (Ep. 4)

Bintang Tamu

Lee Kwang Ik

as [Assassin] (Ep. 5)

Bintang Tamu

Park Jung Min

as [Police officer] (Ep. 5)

Bintang Tamu

Park Kyung Bok

as [Control room employee] (Ep. 5)

Bintang Tamu

Shin Hee Gook

as [Control room employee] (Ep. 5)

Bintang Tamu

Hyun Jin

as [Counselor] (Ep. 6)

Bintang Tamu

Ahn Hyun Jung

as [Sin Gu's wife] (Ep. 6)

Bintang Tamu

Kim Jung Woon

as [Prosecutor] (Ep. 10)

Bintang Tamu

Sean Richard

as Kir

Bintang Tamu

Hong Je Yi

as Jun Hui

Bintang Tamu

Kang Seo Yeon

as Woo Cheong A

Bintang Tamu

Han Eun Seong

as [Captain]

Bintang Tamu

Choi Young Joon

as [Man with scar]

Bintang Tamu

Kim Byung Chul

as [Seon U Jae’s secretary]

Bintang Tamu

Park In Guk

as [Employee]

Bintang Tamu

Kang Myoung Soo

as [Factory worker]

Bintang Tamu

Park Cheol Hwan

Sutradara

Lee Su Yeon

Screenwriter