In 2011 Kim replaced Han Chae-young in the Korea-China-Japan joint production "Strangers 6", which tells the story of six individuals assigned by the highest level authorities of their respective countries to protect the three countries' joint economic area from being infiltrated by a hostile organization. Filming in Japan was delayed by the 2011 earthquake and tsunami, and the TV series aired on Japan's WOWOW TV and Korea's Channel A in 2012.