Alienoid 1

Art Director

• 
  Ryu Seong Hee
• 
  Lee Ha Jun

Cinematography

• 
  Kim Tae Gyeong

Composer

• 
  Jang Yeong Gyu

Costume Designer

• 
  Cho Sang Kyung

Editor

• 
  Shin Min Kyung

Martial Arts Director

• 
  Yoo Sang Seob

Producer

• 
  Kim Sung Min

Screenwriter

• 
  Lee Ki Chul

Screenwriter & Director

• 
  Choi Dong Hoon

Visual Effects

• 
  Jung Do An
• 
  Hong Jeong Ho
• 
  Lee Seung Min
• 
  Jan Svalland
• 
  Christian Korhonen
• 
  Kjetil Kulander
• 
  Torgeir Sanders
• 
  Yoon Hyung Tae
• 
  Choi Jae Cheon
• 
  Joo Hy Jin

Main Role

• 
  Ryu Jun Yeol

  Mu Reuk

  Main Role
• 
  Kim Woo Bin

  Thunder / "Guard"

  Main Role
• 
  Kim Tae Ri

  I An

  Main Role

Support Role

• 
  So Ji Sub

  Moon Do Seok

  Support Role
• 
  Yeom Jung Ah

  Heug Seol

  Support Role
• 
  Jo Woo Jin

  Cheong Un

  Support Role
• 
  Kim Eui Sung

  Ja Jang | Doctor

  Support Role
• 
  Shin Jung Keun

  Woo Wang

  Support Role
• 
  Lee Si Hoon

  Jwa Wang

  Support Role
• 
  Choi Yu Ri

  I An [Young]

  Support Role
• 
  Lee Ha Nee

  Min Gae In [Min Sun's Aunt]

  Support Role
• 
  Ji Gun Woo

  [Killer]

  Support Role

Guest Role

• 
  Jeon Yeo Been

  Hong Eon Nyeon

  Guest Role
• 
  Lee Seon Hee

  [Inn owner]

  Guest Role
• 
  Kim Kang Il

  [Inn old man]

  Guest Role
• 
  Lee Dong Hee

  [Rich man's butler]

  Guest Role
• 
  Kim Chan Hyung

  [Thief]

  Guest Role
• 
  Park Mu Yeom

  [Thief]

  Guest Role
• 
  Lee Hyun Kul

  [Shamanic master #2]

  Guest Role
• 
  Yoon Byung Hee

  [Shamanic master] | [Alien robot voice]

  Guest Role
• 
  Lee Dong Yong

  [Broker]

  Guest Role
• 
  Han Sung Soo

  [Prison guard]

  Guest Role
• 
  Kim Gi Cheon

  Gae Ddong

  Guest Role
• 
  Yoo Jae Myung

  [County magistrate]

  Guest Role
• 
  Park Gwang Jae

  [County superintendent]

  Guest Role
• 
  Woo Yeon Seo

  [Police that I An called]

  Guest Role
• 
  Kim Sun Hyuk

  [Police that I An called] | [Master of the Secret Service of Cheongji]

  Guest Role
• 
  Baek Hyeon Ju

  [I An's principal]

  Guest Role
• 
  Kim Min Che

  [Lady from inn in front of Byeokranjeong]

  Guest Role
• 
  Kim Min Seo

  Min Sun [I An's friend]

  Guest Role
• 
  Ok Ja Yeon

  [Jisan Hospital Doctor]

  Guest Role
• 
  Woo Sang Ki

  [Byeokranjeong staff]

  Guest Role
• 
  Han Seung Yoon

  [Groom]

  Guest Role
• 
  Byun Jin Soo

  [Lord Choi's steward]

  Guest Role
• 
  Lee Byung Wook

  [Wedding ceremony musician]

  Guest Role
• 
  Kim Bang Sun

  [Wedding helper]

  Guest Role
• 
  Jun Eun Mi

  [Wedding helper]

  Guest Role
• 
  Choi Kwang Je

  Nobleman Choi

  Guest Role
• 
  Shim Dal Gi

  [Bride]

  Guest Role
• 
  Go Yoo Joon

  [Drug user]

  Guest Role
• 
  Jeon Jin Ki

  [Subsection chief]

  Guest Role
• 
  Lee Taek Geun

  [Do Seok's fellow detective]

  Guest Role
• 
  Seo Suk Gyu

  [Do Seok's fellow detective]

  Guest Role
• 
  Nam Ji Woo

  [Drug user's lawyer]

  Guest Role
• 
  Park Jong Bum

  [Tentacle-controlled policeman]

  Guest Role
• 
  Kim Hae Sook

  [Milbon old lady]

  Guest Role
• 
  Yang Mi Seon

  [Nobleman Choi's wife]

  Guest Role

Bit part

• 
  Yoon Kyung Ho

  Sam Sik

  Bit part
• 
  Jang Jun Hee

  [Hyeongbang]

  Bit part
• 
  Jeong Ye Seo

  [Gisaeng]

  Bit part
• 
  Oh Chae Eun

  [Gisaeng]

  Bit part
• 
  Lee Ha Joo

  [Gisaeng]

  Bit part
• 
  Kim Jung Han

  [Fisherman]

  Bit part
• 
  Jo Jin Kyul

  [Milbon master]

  Bit part
• 
  Lim Jae Min

  [Milbon master]

  Bit part
• 
  Lee Su Hyung

  [Milbon master]

  Bit part
• 
  Kim Seung Joon

  [Milbon master]

  Bit part
• 
  Shin Hye Ji

  [Bus passenger]

  Bit part
• 
  Kim Ye Ju

  [Bus passenger]

  Bit part
• 
  Lee Ju Hyuk

  [Bus passenger]

  Bit part
• 
  Ha Shi Yeon

  [Bus stop citizen]

  Bit part
• 
  Kim Young Joo

  [Driver stuck in car]

  Bit part
• 
  Ji Sung Eun

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Kim Dan Bi

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Han Soo Ah

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Song Ji Hyuk

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Kim Han Sol

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Kim Yoon Do

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Jeon Ah Hee

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Ahn Jae Won

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Kim Jae Hyun

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Moon Ba Rom

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Park Soo Chan

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Yoon Sang Won

  [Jisan Hospital / Downtown Hava]

  Bit part
• 
  Kim Sun Hyuk

  [Police that Ian called / Master of the Secret Service of Cheongji]

  Bit part
• 
  Yoo Dok Hyun

  [Drug offender]

  Bit part
• 
  Jang Yoon Woo Bit part
• 
  Koh Na Young

  [Jisan Hospital / Hava City Ctr]

  Bit part

Voice Actor

• 
  Kim Dae Myung

  Thunder

  Voice Actor