ASTRO Project Main cast, played by Cha Eun Woo Episode 1x01: Episode 1 (Nov 10, 2016) Episode 1x02: Episode 2 (Nov 17, 2016) Episode 1x03: Episode 3 (Nov 24, 2016) Episode 1x04: Episode 4 (Dec 1, 2016) Episode 1x05: Episode 5 (Dec 8, 2016)