Gunman in Joseon Promotional poster Also known as The Joseon Gunman The Joseon Shooter Gunfighter of Joseon Genre Historical Action Drama Romance Written by Lee Jung-woo Han Hee-jung Directed by Kim Jung-min Cha Young-hoon Starring Lee Joon-gi Nam Sang-mi Jeon Hye-bin Han Joo-wan Yu Oh-seong Composer(s) Lee Ji yong (이지용) cho Eun ah (조은아) Country of origin South Korea Original language(s) Korean No. of episodes 22 Production Executive producer(s) Lee Gun-joon Producer(s) Yoon Jae-hyuk Production location(s) Korea Running time Wednesdays and Thursdays at 21:55 (KST) Production company(s) KBS Media Release Original network Korean Broadcasting System Original release June 25 (2014-06-25) – September 4, 2014 (2014-09-04) Chronology Preceded by Golden Cross Followed by Blade Man External links Website