Kim Nam-gil as Jae-hyuk

Kim Joo-hyun as Yeon-joo

Kim Myung-min as President

Lee Kyung-young as Prime Minister

Kim Young-ae as Mrs. Seok

Jung Jin-young as Pyung-sub

Moon Jeong-hee as Jeong-hye

Bae Gang-Yoo as Min-jae

Kim Dae-myung as Gil-seop

Yoo Seung-mok as Mr. Kam

Kang Shin-il as Mr. Kong

Kim Se-dong as Mr. Nam

Song Young-chang as New Director at Nuclear Power Plant

Kim Young-woong as Mr. Hwang

Kim Han-jong as Jin-taek

Kwak Min-seok as Head of Foreign Cooperation

Park Sun-Hee as Mr. Gam's Wife

Kong Jeong-hwan as Senior Presidential Secretary

Kim Hye-eun as First Lady

Baek Do-bin as Chief Rescuer

Hong Seok-bin as Doctor

Kim Keum-soon as Villager

Oh Ye-seol as New Nurse

Park Pal-Young as Minister of Commerce, Industry and Energy

No Kang-min as Young Jin-taek

Park Joon-young as Storage Tank Recovery Team

Cho Han-cheul as President of Shimwon E&C

Jeong In-gi as Fire Marshal

Son Jong-hak as President of Korea Hydro & Nuclear Power

Song Young-chang as New Director of the Headquarters

Kim Jong-goo as Nuclear Safety Committee Chairman

Shim Young-Min as National Security Chief

Kang Suk-won as Machinery Team Leader

Moon Jong-il as Rescue