Kyo-hwan as Ai Da Gan (special), the Leader of the nomadic Pajeowi tribe. Kim Roi-ha as Ta Hab (special), Ashin's father and head of the Northern Seongjeoyain tribe. Recurring Jung Suk-won as Cho Beom-il (seasons 1–2; special), Cho-Hak-ju's son and Queen Cho's elder brother and a commander in the Royal Army. Kim Jong-soo as Kim Sun, Chief Scholar in Hanyang who clashes with Cho Hak-ju. Kwon Bum-taek as Lee Seung-hui (season 1; special), the Royal physician who attends to the King. Lee Yang-hee as the Minister of War: Powerful politician in Hanyang who is initially loyal to the Haewon Cho clan but finds his loyalty wavering. Jin Seon-kyu as Deok Sung: Ahn Hyeon's loyal right-hand man. Jeon Su-ji as Ashin's mother: She died when Ashin was a child. Joo Suk-tae as Lee Do-jin (seasons 1–2), leader of the Palace Guard who travels south to apprehend Lee Chang. He is loyal to Cho Hak-ju. Ahn Eun-jin as Mu-yeong's wife, who is pregnant and was put under the protection of the Haewon Cho clan. Kim Tae-hoon as Lee Gang-yun (season 2), head of the Royal Army, who travels south with Cho Hak-ju. Jo Han-chul as Won Yu (season 2), descendant of an exiled member of the royal family living a quiet life on remote island, who is sought out by Lee Chang. Ahn Jae-hong as Eunuch (season 2), a former eunuch who later becomes the new king's servant. Kim Kang-hoon as King Yi Yeom (season 2), Mu-yeong's son who was rescued from a horde of zombies as a baby by Seo-bi. Episodes Series overview Season 1 (2019) Season 2 (2020) Special (2021) Production Development Netflix approached Eun-hee, after Signal ended its run, to work on a future project that she could helm. After successfully pitching the concept of the show, Netflix agreed to the proposition and committed to a series order announcement. On March 5, 2017, Netflix announced that it had given the production a series order for a first season. Alongside the series announcement, it was confirmed that Kim Seong-hun would direct the series and that Kim Eun-hee would be credited as the writer. Production companies involved with the series were slated to consist of AStory. Even before the release of the first season, Netflix announced that they would be making a second season. Filming for the second season started in February 2019, with Director Park In-je joining the production to