Tae In Ho

as Eddie Kim / Kim Seung Bok (Tae Sul's friend / Co-founder of Quantum & Time)

as Oh Joo Hwan [Tae Joon's lawyer]

as Han Seung Won

as Son Ji Seung (Busan prosecutor's office investigator)

as Jang's bodyguard

as Yang Seung Hoon

as Oh Je Hoon

as Jung Yoo Taek

as Han Sang Jin

as In Dong Hyuk

as Park Sung Bin

as Seon Woo Chang (Organ transplant center coordinator)

as Song Jeon Shik [Assistant Manager of Fiber Team]

as Kim Yi Jeong [Korean Teacher]

as Ji Ho's father