Pemeran Secretly Greatly

Kim Soo Hyun (김수현)

as Won Ryu Hwan / Bang Dong Gu

Pemeran Utama

Lee Hyun Woo (이현우)

as Lee Hae Jin

Pemeran Utama

Park Ki Woong

as Lee Hae Rang / Kim Min Su

Pemeran Utama

Park Hye Sook

as Jun Son Rim

Pemeran Pembantu

Um Tae Goo

as Hwang Jae O

Pemeran Pembantu

Lee Chae Young

as Ran

Pemeran Pembantu

Kim Sung Kyun (김성균)

as Seo Soo Hyuk [NIS team leader]

Pemeran Pembantu

Ko Chang Seok

as Seo Sang Gu [2nd lieutenant] / Seo Young Kook [Professor]

Pemeran Pembantu

Lee Yeon Kyung

as [Chi Woong and Se Woong's mother]

Pemeran Pembantu

Park Eun Bin (박은빈)

as Yoon Yoo Ran

Pemeran Pembantu

Choi Woo Shik (최우식)

as Yoon Yoo Joon [Yoo Ran's younger brother]

Pemeran Pembantu

Son Hyun Joo

as Kim Tae Won [Colonel / 5446 Corps training chief]

Pemeran Pembantu

Hong Kyung In

as Jo Doo Suk

Pemeran Pembantu

Yoo Jun

as Lee Hae Rang [Young]

Pemeran Pembantu

Jo Yeong Jin

as Kim Hee Kwan

Pemeran Pembantu

Cho Yong Jin

as Se Woong

Pemeran Pembantu

Joo Hyun

as Ri Mu Hyok [North Korean Military beneral]

Bintang Tamu

Kim Bup Rae

as [NIS general manager]

Bintang Tamu

Jason Yu

Asisten Sutradara

Jang Cheol Soo

Sutradara

Kim Sun Min

Editor

Dalpalan

Music Editor

Jang Yeong Gyu

Music Editor

Hun

Original Creator

Yoon Hong Gi

Screenwriter

Kim Bang Hyun

Screenwriter

Jo Suk Hyun

Screenwriter & Sutradara

Park Jung Gi

as [Team leader]

Bit part

Lee Gyu Sub

as [Deong Chi's subordinate]

Bit part

Won Hyun Joon (원현준)

as [National Intelligence service agent]

Bit part

Yoon Ji Wook

as [Self-determination troop member]

Bit part

Sung Yoo Bin

as Ri Hae Jin [Young]

Bit part

Lee Sang Bo

as [National Intelligence agent A]

Bit part

Kang Eun Tak

as [National Intelligence agent C]

Bit part

Shin Jung Keun

as Mr. Park

Bit part

Go In Beom

as [NIS director]

Bit part

Moon Won Ju

as Choi

Bit part

Lee Jae Woo

as [North Korea military officer]

Bit part

Go Won Seok

as [Resident spy]

Bit part

Lee Jung Hoon

Bit part