Before Mars201633 minDramaLoading watch options…This is the backstory of Hana and Joon Seung, characters in the series "MARS" on Nat Geo. The twin sisters are struggling to fit into their new home and find a ham radio, allowing them to develop a friendship with a female astronaut..DirectorLloyd Lee ChoiCastNekhebet Kum JuchUatchet Jin JuchJoyce WongPeter JuddShea Grant