SKY Castle Promotional poster Hangul SKY 캐슬 Genre Satire Drama Dark Comedy Written by Yoo Hyun-mi Directed by Jo Hyun-tak Starring Yum Jung-ah Lee Tae-ran Yoon Se-ah Oh Na-ra Kim Seo-hyung Composer(s) JTBC Content Hub (JTBC콘텐트허브) Country of origin South Korea Original language(s) Korean No. of episodes 20 + special Production Executive producer(s) Kim Ji-yeon Moon Bo-mi Park Joon-seo Producer(s) Joo Sang-kyoo Camera setup Multi-camera Running time 60–80 minutes Production company(s) HB Entertainment [ko] Drama House. JTBC [ko] Distributor JTBC Netflix[1] iflix[2] Release Original network JTBC Picture format 1080i (HDTV) Original release November 23, 2018 (2018-11-23) – February 1, 2019 (2019-02-01) External links Website