Characters played by Rae-won Kim
Kang Do Young
Characters played by Lee Jong-Suk
Navy Captain
Characters played by Cha Eun-Woo
Navy Sonar Technician
Characters played by Lee Min-ki
Navy Captain
Characters played by Sang-hee Lee
EOD Squad Sergeant
Characters played by Byeong-eun Park
Cha Young Han
Characters played by Dal-hwan Jo
Navy Sergeant
Characters played by Sang-Hoon Jung
Oh Dae Oh