Composer
Director
Editor
Screenwriter
Main Role
- Han Hyo Joo Main Role
- Park Hyung Sik Main Role
- Jo Woo Jin Main Role
Support Role
- Lee Joon Hyuk Support Role
- Park Joo Hee Support Role
- Baek Hyun Jin Support Role
- Moon Ye Won Support Role
- Park Hyung Soo Support Role
- Jung Woon Sun Support Role
- Song Ji Woo Support Role
- Bae Hae Seon Support Role
- Cha Soon Bae Support Role
- Han Joon Woo Support Role
- Park Hee Bon Support Role
- Na Chul Support Role
- Lee Joo Shil Support Role
- Hong Soon Chang Support Role
- Kang Han Saem Support Role
- Kim Young Woong Support Role
- Lee Ji Ha Support Role
- Lee Joo Seung Support Role
- Han Da Sol Support Role
- Nam Mi Jung Support Role
- Joo Jong HyukKim Seung Beom [Seyang personal trainer]Support Role
Guest Role
- Nam Sang WooLee Jong Tae (Ep. 1)Guest Role
- Park Sung Il[Seyang High teacher] (Ep. 1)Guest Role
- Choi Yi Sun[Motel clerk] (Ep. 1)Guest Role
- Seon Yool Woo[Detective, Seyang Police Station] (Ep. 1)Guest Role
- Yoo Tae Joo[Guard post soldier] (Ep. 1)Guest Role
- Kim Yeon WooIl Ho (Ep. 1)Guest Role
- Lee Kyu HyungLee Seung Yeong [Special ops unit] (Ep. 1-3, 8, 12)Guest Role
- Baek Sung Chul[Reporter] (Ep. 2)Guest Role
- Baek Joo HeePark Min Ji [Joo Hyung's wife] (Ep. 2-3)Guest Role
- Kang Ji EunKim Bok Nam [Sae Bom's mother] (Ep. 2-3)Guest Role
- Yoon Sang WonKang Ju Heon [Trainer] (Ep. 2-3)Guest Role
- Jung Jae Eun[Yi Hyun's mother] (Ep. 3)Guest Role
- Seo Hyun Chul[Yi Hyun's father] (Ep. 3)Guest Role
- Jeon Seok ChanPark Yong Cheol [Seo Yoon's father, #502] (Ep. 3)Guest Role
- Kim Shi Heon[Paramedic] (Ep. 3)Guest Role
- Park Chul Min[Anchorman] (Ep. 3)Guest Role
- Lee Gi YoungChoi Seok Ju [Atum Therapeutics Chairman] (Ep. 3-4, 7-9)Guest Role
- Kim Joo Yeon Guest Role
- Lee Dong Kyu[TNBC anchorman] (Ep. 4)Guest Role
- Jung Min Sung[Bulding #102 resident] (Ep. 4-7)Guest Role
- Park Hee Eun[Resident] (Ep. 5)Guest Role
- Park Ki Ryung[Prime Minister] (Ep. 5)Guest Role
- Yoo Ji YeonPark Young In [Tae Seok's wife] (Ep. 8)Guest Role
- Yoon Bok Sung[Politician] (Ep. 8)Guest Role
- Lee Seung JoonKim Tae Yoon [Brigadier general] (Ep. 12)Guest Role
- Sun Young Uk[Seyang Forest Le Ciel security guard]Guest Role
- Han Sa MyungSung Woo Je (Ep. 1)Guest Role
- Ahn Ji HwanAhn Kook JinGuest Role
- Jung Hyeon Ok[Infectee]Guest Role
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