Song Hye-kyo
On June 12, 2015, lead actors Song Joong-ki and Song Hye-kyo filmed their first scene in Seoul. On September 28, 2015, the entire cast and crew (including the four leads, Song Joong-ki, Song Hye-kyo, Jin Goo, Kim Ji-won, as well as supporting actors Kang Shin-il and Onew) departed for Greece. The team resided in the country for approximately a month to shoot episodes crucial to the drama's plot. According to Greek and South Korean news portals and blogs, filming mainly took place in Zakynthos, Arachova, Lemnos, and Navagio. While the series' location was modelled after Iraq, the decision was made to locate the remote area torn by war at the margin of Balkan Peninsula to avoid diplomatic conflict with the Iraqis.