哇，窗口太小啦

饰演：Son Ji Seung (Busan prosecutor's office investigator)

饰演：Kim Yi Jeong [Korean Teacher]

饰演：Oh Joo Hwan [Tae Joon's lawyer]

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

饰演：Han Seung Won

饰演：Han Sang Jin

饰演：Park Sung Bin

饰演：Song Jeon Shik [Assistant Manager of Fiber Team]

饰演：Jang's bodyguard

饰演：Yang Seung Hoon

饰演：Jung Yoo Taek

饰演：Seon Woo Chang (Organ transplant center coordinator)

饰演：Ji Ho's father