On May 3, it was confirmed that actress Lee Yeon Hee will be taking over Kim Hee Sun's original spot for season 2. Kim Hee Sun will begin filming for her new tvN drama soon and therefore will not be able to participate in season 2. 

During season 1, 'Island Musketeers' detailed Kang Ho Dong, Kim Hee Sun, and CNBLUE Yonghwa's adventures to various islands in Korea, living the lives of islanders and mingling with the citizens of the islands. Since Yonghwa is currently serving his mandatory military service, it seems the returning season will be recruiting another cast member soon. 

Stay tuned for more on 'Island Musketeers 2'!