| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Dalpalan | Crew | Sound | Original Music Composer | 20 |
 Jung Do-ahn | Crew | Visual Effects | Special Effects Supervisor | 20 |
Kim Chang-ju | Crew | Editing | Editor | 20 |
 Chae Kyung-hwa | Crew | Costume & Make-Up | Costume Design | 20 |
 Kang Full | Crew | Writing | Screenplay, Comic Book, Creator | 20 |
Kim Woo-taek | Crew | Production | Executive Producer | 20 |
 Park In-je | Crew | Directing | Director, Creator | 20 |
Yu Jae-hyeok | Crew | Production | Co-Executive Producer | 20 |
Jang Kyung-ik | Crew | Production | Executive Producer | 20 |
Lee Hyung-deok | Crew | Camera | Director of Photography | 20 |
 Choi Tae-young | Crew | Sound | Sound Supervisor | 20 |
 Chae Kyoung-sun | Crew | Art | Production Design | 20 |
Jung Hoon | Crew | Camera | Grip | 20 |
Yoon Yeong-soo | Crew | Camera | Director of Photography | 20 |
Eun Hee-soo | Crew | Sound | Production Sound Mixer | 20 |
Kwak Tae-yong | Crew | Costume & Make-Up | Special Effects Makeup Artist | 20 |
Gang Hye-yeong | Crew | Sound | Sound | 20 |
 Cho Tae-hee | Crew | Costume & Make-Up | Makeup & Hair | 20 |
Hwang Hyo-kyun | Crew | Costume & Make-Up | Special Effects Makeup Artist | 20 |
Torgeir Sanders | Crew | Visual Effects | VFX Supervisor | 20 |
Kang Jong-ik | Crew | Visual Effects | VFX Supervisor | 20 |
Hong Eue-su | Crew | Camera | Grip | 20 |
Moon Il-ho | Crew | Lighting | Lighting Director | 20 |
Yoon Hyung-tae | Crew | Visual Effects | Special Effects Supervisor | 20 |
Jin Hoon | Crew | Art | Props | 20 |
 Heo Myeong-haeng | Crew | Crew | Martial Arts Choreographer | 20 |
Kim Il-kwang | Crew | Editing | Colorist | 20 |
 Ryu Seong-cheol | Crew | Crew | Martial Arts Choreographer | 20 |
Ryu Si-moon | Crew | Lighting | Lighting Director | 20 |
Seo Joo-yeon | Crew | Art | Production Design | 20 |
 Son Byung-ho | Cast | Actor | Chief of Security Department | 4 |
 Yang Dong-geun | Cast | Actor | Jeong Jun-hwa | 6 |
 Moon Sung-keun | Cast | Actor | Min Yong-jun | 20 |
 Ryoo Seung-bum | Cast | Actor | Frank | 20 |
 Cha Tae-hyun | Cast | Actor | Jeon Gye-do | 20 |
 Choi Deok-moon | Cast | Actor | Jeon Yeong-seok (Bongpyeong) | 5 |
 Park Hee-soon | Cast | Actor | Kim Deok-yoon | 20 |
 Baek Hyun-jin | Cast | Actor | Jung Sang-jin (Jincheon) | 4 |
 Han Hyo-joo | Cast | Actress | Lee Mi-hyun | 20 |
 Zo In-sung | Cast | Actor | Kim Doo-sik | 20 |
 Hwang Jeong-min | Cast | Actress | Butcher Shop Owner | 2 |
 Yoo Seung-mok | Cast | Actor | Jo Rae-hyuk | 8 |
 Maeng Bong-hak | Cast | Actor | Street vendor Choi | 1 |
 Ryu Seung-ryong | Cast | Actor | Jang Ju-won | 20 |
 Park Byung-eun | Cast | Actor | Ma Sang-goo | 4 |
 Lee Hae-yeong | Cast | Actor | Chief of police | 1 |
 Kim Hee-won | Cast | Actor | Choi Il-hwan | 20 |
 Cho Jae-wan | Cast | Actor | Airliner Captain | 1 |
 Min Ji-a | Cast | Actress | Bong-seok's Elementary School Teacher | 1 |
 Kim Yoon-sung | Cast | Actor | Bat-ta | 2 |
 Kim Sung-kyun | Cast | Actor | Lee Jae-man | 20 |
 Jun Suk-ho | Cast | Actor | Yoon Sung-wook | 8 |
 Jo Bok-rae | Cast | Actor | Park Chan-il | 7 |
 Kwon Han-sol | Cast | Actress | Min’s Secretary | 3 |
 Kang Kyung-woo | Cast | Actor | Ulsan & Pohang Gangster | 1 |
 Kim Jung-young | Cast | Actress | Jeon Gye-do's Mother's Voice | 1 |
 Kim Jong-soo | Cast | Actor | Hwang Ji-sung | 9 |
 Kwak Sun-young | Cast | Actress | Hwang Ji-hee | 20 |
 Oh Hee-jun | Cast | Actor | Police | 1 |
 Lee Jung-ha | Cast | Actor | Kim Bong-seok | 20 |
 Park Kyung-hye | Cast | Actress | NIS Employee | 1 |
 Lee Sang-hee | Cast | Actor | Badminton Court Landlord | 1 |
 Han Sa-myeong | Cast | Actor | Vice company commander | 2 |
 Kim Jong-il | Cast | Actor | Self (archive footage) | 1 |
 Kyul Hwi | Cast | Actor | Plus Motel 403 | 2 |
 Yoon Dae-yeul | Cast | Actor | Nolgae | 1 |
 Im Sung-jae | Cast | Actor | Bae Min-ki | 2 |
 Yoon Jin-young | Cast | Actor | Tattoed Man | 3 |
 Andreas Fronk | Cast | Actor | Russian agent | 1 |
 Lee Ho-jung | Cast | Actress | Yang Se-eun | 2 |
 Kim Dae-jung | Cast | Actor | Self (archive footage) | 1 |
 Shim Dal-gi | Cast | Actress | Shin Hye-won | 4 |
 Lee Soon-hwa | Cast | Actress | Jeon Gye-do's Mother | 1 |
 Kim Kuk-hee | Cast | Actress | Hong Sung-hwa (Naju) | 6 |
 Kim Do-hoon | Cast | Actor | Lee Gang-hoon | 20 |
 Park Seong-il | Cast | Actor | Jae-seong | 1 |
 Son Bo-seung | Cast | Actor | Butcher Shop Owner's Son | 3 |
 Lee Dong-yong | Cast | Actor | Bus Driver | 3 |
 Lee Yoon-hee | Cast | Actor | NIS staff | 2 |
 Shin Mi-yeong | Cast | Actress | Sung-woo's mother | 1 |
 Jo Hong-woo | Cast | Actor | Funeral House Staff | 1 |
 Kim Tae-yul | Cast | Actor | Frank (12 Years Old) | 2 |
 Park Kwang-jae | Cast | Actor | Kwon Yong-deuk | 6 |
 Kim Joong-hee | Cast | Actor | Lim Jae-seok | 3 |
 Yoo Soo-ho | Cast | Actor | Mario | 1 |
 Sung Yeol-seok | Cast | Actor | Longjing Hotel Korean-Chinese | 1 |
 Choi Yoon-bin | Cast | Actor | Bungaeman Assistant Director | 1 |
 Lee Suk-hyeong | Cast | Actor | Janggyeong High Class President | 1 |
 Kim Dae-geun | Cast | Actor | Ulsan & Pohang Gangster | 2 |
 Han Sang-jo | Cast | Actor | Ulsan & Pohang Gangster | 2 |
 Lee Si-hoo | Cast | Bungaeman PD | 1 | |
 Han Sang-kyung | Cast | Actor | Tattoed Man's Friend | 1 |
 Go Youn-jung | Cast | Actress | Jang Hui-soo | 20 |
 Shin Jae-hwi | Cast | Actor | Bang Ki-soo | 12 |
 Kim Da-hyun | Cast | Actor | Bae Jae-hak | 4 |
 Gwak Min-zun | Cast | Actor | Janggyeong High Student Officer | 1 |
 Kim Joon | Cast | Actor | Jeon Gye-do (10 Years Old) | 1 |
 Ryoo Je-seung | Cast | Actor | Longjing Hotel Bellman | 1 |
 Moon Jung-dae | Cast | Actor | Gwang-jin | 1 |
 Kim Shin-rock | Cast | Actress | Yeo Woon-kyu | 10 |
Lee Eun-soo | Cast | Actor | Hui-soo's Classmate at Janggyeong High | 1 |
 Back Joo-hee | Cast | Actress | Plus Motel Innkeeper | 2 |
 Kim Tae-young | Cast | Actress | Umji Coffee Shop's Miss Park | 1 |
 Kim Deok-ju | Cast | Actress | Old woman | 1 |
 Park Jong-beom | Cast | Actor | Waiter Minky | 1 |
 Ahn Hyun-bin | Cast | Actor | Jang Ju-won’s colleague | 1 |
 Daniel C. Kennedy | Cast | Actor | Mark | 4 |
 Moon Byeong-ju | Cast | Actor | Drunken Hiker | 1 |
 Kang Sook | Cast | Actress | School Uniform Store Owner | 1 |
 Bae Hyeon-jun | Cast | Actor | Class 3-3 Student | 5 |
 Park Ok-chul | Cast | Actress | Director of North Korea Information Office | 1 |
 Song Duk-ho | Cast | Actor | Seo Yu-ra's Boyfriend | 1 |
 Kang Chae-young | Cast | Actress | Janggyeong High Female Juvie | 1 |
 Park Han-sol | Cast | Actress | Han Byul | 12 |
 Yoon Sa-bong | Cast | Actress | Janitress | 7 |
Lee Jae-hong | Cast | Actor | Melody Lody | 1 |
 Park Bo-kyung | Cast | Actress | Shin Yoon-young | 6 |
 Seo Yi-ra | Cast | Actress | Seo Yu-ra | 1 |
 Lee Hae-sun | Cast | Actress | Airliner Kid's Mother | 1 |
Seo Moon-ho | Cast | Actor | Street vendor Park | 1 |
 Jang Jeong-yeon | Cast | Actor | Class 3-3 Student | 5 |
 Hong Xa-bin | Cast | Actor | Chief Mourner | 2 |
 Jun Hee-ryeon | Cast | Actor | Former Marine Corps Car Owner | 1 |
 Park Jun-hwan | Cast | Actor | Praying Family's Father | 1 |
 Lee Jae Seong | Cast | Actor | Ulsan & Pohang Gangster | 2 |
 Song Yeon | Cast | Actress | Janggyeong High Female Juvie | 1 |
Gil Do-yeong | Cast | Hui-soo's Classmate at Janggyeong High | 1 | |
 Ha Jae Yeol | Cast | Actor | Ulsan & Pohang Gangster | 2 |
 Shin Hee-cheol | Cast | Actor | Doctor | 1 |
 Kim Geun-Hwan | Cast | Actor | Longjing Hotel Agent | 2 |
 Won Choon-gyu | Cast | Actor | Director of Anti-communist Investigation Bureau | 1 |
 Park Jeong-gon | Cast | Actor | Hypnotic Student | 1 |
| Person | Type | Job | Role(s) | Episodes |
