Director
Editor
Screenwriter
Main Role
- Yoon Shi YoonSeo Do WonMain Role
- Kyung Soo JinHan Seo KyungMain Role
- Shin So YoolLee Jung MinMain Role
Support Role
- Lee Hang NaOh Mi Sook [Section chief detective]Support Role
- Nam Moon ChulSeo Jae Cheol [Do Won's father]Support Role
- Jo Wan KiWoo Jae Hyuk [Detective]Support Role
- Kim Dong YoungKim Jin Woo [Detective]Support Role
- Choi Seung YoonDr. Suk Min Joon (Ep. 5-12)Support Role
- Yoon Bok InJo Young Ran [Seo Kyung's stepmother]Support Role
- Cha YeobLee Sung Wook [Seo Kyung's stepbrother]Support Role
- Kim Jin SeoHan Kyu Tae [Seo Kyung's father]Support Role
- Baek Jae WooKang Joon Young [Detective]Support Role
- Lee Jae In[Detective / World B]Support Role
- Lee Min JaeSeo Do Won [Young]Support Role
- Im Chae HyunHan Seo Kyung [Young]Support Role
- Kim Yoo ChanLee Sung Wook [Young]Support Role
Guest Role
- Kwon Han SolLee Ji Young (Ep. 1-3)Guest Role
- Chang RyulPark Tae Kyung (Ep. 1, 9)Guest Role
- Yoo Ji Hyuk[Detective] (Ep. 1, 6)Guest Role
- Park Se Hoon[Police officer] (Ep. 1)Guest Role
- Shin Seung Ryul[Police officer] (Ep. 1)Guest Role
- Kim Bi Bi[Medical examiner] (Ep. 1-2, 7)Guest Role
- Myung Seok GeunKang Dong Shik [Officer] (Ep. 2)Guest Role
- Kang Chung Hun[Reporter] (Ep. 2)Guest Role
- Oh Yoo Mi[Attorney] (Ep. 2)Guest Role
- Park Mi Na[Caregiver] (Ep. 2)Guest Role
- Kim Chae Hyun[Psychiatrist](Ep. 2)Guest Role
- Han Myung Hwan[Police officer] (Ep. 2)Guest Role
- Park Jung WonPark Min Kyung (Ep. 3-4)Guest Role
- Jang Hae SongLee Jin Sung (Ep. 3-4, 6)Guest Role
- Eom Ok RanJung Hyung Hee (Ep. 3, 5-7)Guest Role
- Kim Jung SooPark Young Tae [Pastor] (Ep. 3-4)Guest Role
- Choi Se in[Train girl] (Ep. 3)Guest Role
- Park Geon Rak[Detective] (Ep. 3-4)Guest Role
- Oh Ki Hwan[Detective] (Ep. 3-5)Guest Role
- Jung Hyun Seok[Church paster] (Ep. 3)Guest Role
- Ahn Hye Won[Child's mother] (Ep. 3)Guest Role
- Lee Chae Min[Host club manager] (Ep. 3)Guest Role
- Choi Nam Wook[Train station staff] (Ep. 3)Guest Role
- Ki Hwan[Min Kyung's husband] (Ep. 4)Guest Role
- Cha Sang Mi[Church flyer woman] (Ep. 4)Guest Role
- Jun Joon Woo[Police Audit Section officer] (Ep. 4)Guest Role
- Park Eun Young[Restaurant owner] (Ep. 5)Guest Role
- Uhm Tae Ok[Ilsuk Landscaping staff] (Ep. 5-6)Guest Role
- Park Jin Young[Jung Kyung Hee's daughter] (Ep. 5, 9)Guest Role
- Jo Yong JinDong Hyeon (Ep. 6)Guest Role
- Bae Yoo RiJo Young Ran [Young] (Ep. 6)Guest Role
- Yoo Chae YeonHan Seo Kyung [Child] (Ep. 6)Guest Role
- Sung Chan Ho[Man discussing Dong Hyeon] (Ep. 6)Guest Role
- Lim Dong Yoon[Junkyard man] (Ep. 7)Guest Role
- Min Dae Shik[Doctor] (Ep. 8)Guest Role
- Jang Eui DonGo Jae Joon (Ep. 11)Guest Role
- Kim Jong Ho[Station room staff] (Ep. 11)Guest Role
- Park Jung Min[Detective]Guest Role
- Jun Jung Il[Optometrist]Guest Role
- Byun Gun Woo[Police officer]Guest Role
- Han Song Ho[Delivery man]Guest Role
- Lee Yook Heon[Convenience store owner] (Ep. 3)Guest Role
- Kim Jin Ok[Neighborhood woman] (Ep. 5)Guest Role
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