Rookie Historian Goo Hae Ryung

Director

• 
  Kang Il Soo
• 
  Han Hyeon Hui

Music Editor

• 
  Lee Pil Ho

Screenwriter

• 
  Kim Ho Soo

Main Role

• 
  Shin Sae Kyeong

  Goo Hae Ryung / Hui Yeon

  Main Role
• 
  Cha Eun Woo

  Prince Yi Rim / Maehwa / Prince Dowon

  Main Role
• 
  Park Ki Woong

  Crown Prince Yi Jin

  Main Role
• 
  Lee Ji Hoon

  Min U Won

  Main Role

Support Role

• 
  Park Ji Hyun

  Song Sa Hee [Historian]

  Support Role
• 
  Gong Jung Hwan

  Koo Jae Gyeong [Hae Ryung's brother]

  Support Role
• 
  Kim Min Sang

  Lee Tae [King]

  Support Role
• 
  Choi Duk Moon

  Min Ik Pyung [Second state councillor]

  Support Role
• 
  Jun Ik Ryoung

  Mo Hwa [Female physician]

  Support Role
• 
  Kim Yeo Jin

  Queen Dowager Yim [Yi Rim's grandmother]

  Support Role
• 
  Sung Ji Ru

  Heo Sam Bo [Eunuch]

  Support Role
• 
  Yang Jo Ah

  Seol Geum [Hae Ryung's maid]

  Support Role
• 
  Lee Ye Rim

  Oh Eun Im [Female historian]

  Support Role
• 
  Jang Yu Bin

  Heo Ah Ran [Female historian]

  Support Role
• 
  Heo Jung Do

  Yang Si Haeng [Royal historian]

  Support Role
• 
  Nam Tae Woo

  Son Gil Seung [Royal historian]

  Support Role
• 
  Kang Hoon

  Hyun Kyung Mook [Royal historian]

  Support Role
• 
  Jin Geon U

  Sung Seo Kwon [Royal historian]

  Support Role
• 
  Oh Hee Joon

  Ahn Hong Ik [Royal historian]

  Support Role
• 
  Lee Jung Ha

  Kim Chi Kook [Royal historian]

  Support Role
• 
  Yoon Jung Sub

  Hwang Jang Gun [Royal historian]

  Support Role
• 
  Kim Yong Woon

  Gwi Jae [Ik Pyung's minion]

  Support Role
• 
  Lee Kwan Hoon

  Gak Soi [Jae Kyung's right-hand]

  Support Role
• 
  Ryu Tae Ho

  Song Jae Chun [Senior fifth rank officer]

  Support Role
• 
  Seo Kwang Jae

  [King's eunuch]

  Support Role
• 
  Cha Kwang Soo

  Jo Seung Kwang [Vice chancellor]

  Support Role
• 
  Park Young Soo

  Mr. Kim [Bookseller]

  Support Role
• 
  Jung Chan

  [Chancellor]

  Support Role
• 
  Kwon Hong Seok

  [Royal advisor]

  Support Role
• 
  Kim Kwi Seon

  [Second vice-premier]

  Support Role
• 
  Yoo Se Rye

  Court Lady Choe

  Support Role
• 
  Kim Ye Rin

  Min Woo Hui [Crown Princess and Woo Won's sister]

  Support Role
• 
  Yoon Jong Won

  [Palace guard]

  Support Role
• 
  Nam Jung Woo

  Jegal Tak [Official, Royal Secretariat]

  Support Role
• 
  Jo Jae Wan

  [Chief Royal Secretary]

  Support Role
• 
  Lee Kun Goo

  Yi Baek

  Support Role

Guest Role

• 
  So Hee Jung

  [Noble woman] (Ep. 1)

  Guest Role
• 
  Gil Jung Woo

  Jang Su [Enslaved boy] (Ep. 1-2)

  Guest Role
• 
  Lee Jong Hyuk

  [Master] (Ep. 1-2)

  Guest Role
• 
  Jo Jae Yun

  Kim Chuk Jeom [Investigation Bureau officer] (Ep. 3)

  Guest Role
• 
  In Sung Ho

  [Palace gate sentry] (Ep. 3)

  Guest Role
• 
  Seo Young Joo

  Lee Seung Hoon [Hae Ryung's arranged groom] (Ep. 4-5, 14)

  Guest Role
• 
  Jo Si Yeon

  [Fearful of solar eclipse] (Ep. 5)

  Guest Role
• 
  Kim Yong Jin

  Officer Park [Payday clerk] (Ep. 6)

  Guest Role
• 
  Ahn Soo Ho

  Clerk Park [Upset bribery clerk] (Ep. 6)

  Guest Role
• 
  Song Chang Gyu

  [Peddler] (Ep. 7)

  Guest Role
• 
  Choi Gyo Shik

  [Peddler] (Ep. 7)

  Guest Role
• 
  Kim Dan Woo

  [Mother with smallpox] (Ep. 7-8)

  Guest Role
• 
  Park Yong

  [Royal advisor] (Ep. 8)

  Guest Role
• 
  Ha Roo Bi

  [Smallpox vaccine recipient] (Ep. 8)

  Guest Role
• 
  Ri Min

  Jang Song Hyung [Governor of Pyongan province] (Ep. 13-14)

  Guest Role
• 
  Kang Suk Won

  [Chief sentry] (Ep. 14)

  Guest Role
• 
  Lee Seung Hyo

  Seo Moon Jik [Hae Ryung's father] (Ep. 14, 20)

  Guest Role
• 
  Jang Ho Joon

  Yeong San [Jae Gyeong's friend] (Ep. 14, 20)

  Guest Role
• 
  Lee Do Yeop

  Sim Geom Yeol [Hermit historian] (Ep. 18)

  Guest Role
• 
  Na Hyun Woo

  [Special appearance] (Ep. 18)

  Guest Role
• 
  Lee Do Gyeom

  [Official who bribed Lord Song] (Ep. 19)

  Guest Role
• 
  Fabien

  Jean Baptiste Barthélemy [Foreigner Intruder] (Ep. 24-28, 36)

  Guest Role
• 
  Kim Hyun Soo

  So Young Hwa [Baek Sun's daughter / Candidate for Prince Yi Rim's bride] (Ep. 31)

  Guest Role
• 
  Kim Myung Soo

  So Baek Sun [Commander of the Military Training Corps] (Ep. 31-32, 35, 38-39)

  Guest Role
• 
  Yoon Jong Hoon

  Deposed King / Ho Dam [Yi Rim's father] (Ep. 32-36, 39-40)

  Guest Role
• 
  Jung Se Hyun

  Bi Ja

  Guest Role
• 
  Kim Ji An

  Yeo Sik

  Guest Role
• 
  Jo Min Ah

  Mo Hwa [Young]

  Guest Role
• 
  Uhm Ji Sung

  Goo Jae Kyung [Young]

  Guest Role
• 
  Jung Yun Ha

  Hae Ryung / Hui Yeon [Young]

  Guest Role
• 
  Kim Noh Jin

  Dan Young [Woo Won's wife]

  Guest Role
• 
  Lee Doo Suk

  Kim Il Mok [Royal historian]

  Guest Role
• 
  Kim Seung Hyun

  [Monk]

  Guest Role
• 
  Park Sang Hyun

  [Gisaeng]

  Guest Role
• 
  Jeon Jeong Il

  [Husband]

  Guest Role
• 
  Seo Dong Oh

  [Executioner]

  Guest Role
• 
  Hwang Hyun Jeong

  [Young bride]

  Guest Role
• 
  Park Jung In

  [Noblewoman]

  Guest Role
• 
  Yong Jin

  [Government clerk]

  Guest Role
• 
  Woo Mi Hwa

  [Goo Hae Ryung's teacher]

  Guest Role
• 
  Seo Hye Jin Guest Role
• 
  Jo Joon Guest Role
• 
  Jung Jin Guest Role
• 
  Kim Jin Ok

  [Maid]

  Guest Role
• 
  Kil Sung Joo

  [Woman]

  Guest Role

Unknown

• 
  Jo Sun Ki Unknown
• 
  Kim Cha Yoon Unknown
• 
  Kwon Chan Min Unknown
• 
  Kang Sung Chan Unknown
• 
  Kim Woo Bin Unknown