All About Content From : Asianwiki, OCN Profile : Drama : Tunnel Revised Romanization : Teoneol Hangul : Director : Shin Yong Hwi, Nam Ki Hoon Writer : Lee Eun Mi Network : OCN Episodes : 16 Release Date : March 25 - May 21, 2017 Runtime : Sat. & Sun : 22:00 Languange : Korean Country : South Korea