<Li> Kim Min - seok as Private First Class Kim Gi - bum (later promoted to Staff Sergeant as seen in ep 16). A pickpocket later enlisted to the army . </Li> <Ul> <Li> Cho Tae - gwan as Daniel Spencer (Peacemaker Emergency Doctor Team) </Li> <Li> Jeon Soo - jin as Ri Ye - hwa (Peacemaker Emergency Nurse Team) </Li> <Li> David Lee McInnis as David Argus (Gang Boss, former Delta Force Captain), the main antagonist . </Li> <Li> Dean Dawson as the Chief of Police (Tae Baek Police Chief) </Li> <Li> Jo Jae - yoon as Jin Young - soo (Chief Manager of Uruk Electric Power Corporation) </Li> <Li> Lee Yi - kyung as Kang Min - jae </Li> <Li> Zyon Barreto as Fatima </Li> <Li> Elena Zhernovaia as Valentine </Li> <Li> David Pipes as Martin (World Times Reporter) </Li> <Li> Ji Seung - hyun as Senior Lieutenant Ahn Jung - joon, Korean People's Army . </Li> <Li> Kwak In - joon as Lee Han - soo (Minister of Foreign Affairs) </Li> <Li> Joey Albright as US Army Delta Force member </Li> </Ul> <Li> Cho Tae - gwan as Daniel Spencer (Peacemaker Emergency Doctor Team) </Li> <Li> Jeon Soo - jin as Ri Ye - hwa (Peacemaker Emergency Nurse Team) </Li>

Who plays daniel in descendants of the sun