Season 1 A children's mystery drama about four kid detectives solving various cases happening at school. Details Casts Galleries Posters Season Lists Episode Lists Title Season 1 Genres Mystery Drama Air Date 2014-02-07 Episode Runtime 00 Hours 30 Minutes Season Number 1 Episode Count On Season 1 16 Production Companies Unknown Kim Ji-min... Kang Ha Ra... Tang Joon-sang... Lee Seo Jin... Yoon Chan-young... Lee Woo Jin... Yoo Jun... Choi Dong Yeong... Park Si-eun... Jin Sun Mi... Heo Jung-min... Choi Gi Chan... Kim Myung-soo... Kang Suk... Uhm Hyun-kyung... Song Soo Ji... Choi Shang... Teacher Ma... Original Size (1907x1073) Original Size (1885x2828) Season 1 16 Episode(s) 2014-02-07 Episode 1 2014-02-07 Episode 1... Episode 2 Episode 2... Episode 3 Episode 3... Episode 4 Episode 4... Episode 5 Episode 5... Episode 6 Episode 6... Episode 7 Episode 7... Episode 8 Episode 8... Episode 9 Episode 9... Episode 10 Episode 10... Episode 11 Episode 11... Episode 12 Episode 12... Episode 13 Episode 13... Episode 14 Episode 14... Episode 15 Episode 15... Episode 16 2014-05-23 Episode 16...