7 gwanggu Online

Ha Ji-Won - Cha Hae-joon, Sung-Ki Ahn - Lee Jeong-man (as Sung-kee Ahn) , Ji-Ho Oh - Kim Dong-soo (as Ji-ho Oh) , Ye-ryeon Cha - Genetic researcher Park Hyeon-jeong, Han-wi Lee - Dr. Jang Moon-hyeong, Cheol-min Park - Do Sang-goo, Sae-byeok Song - Go Jong-yoon (as Sae-Byeok Song) , Jeong-hak Park - Captain Hwang In-hyeok, Yeong-soo Park - Jang Chi-soon, Min-Seok Oh - Yoon Hyeon-woo (as Seok Min) , Yin-gi Jeong - Hae-joon's father