Another good one for the k-drama fans.
Kill Me, Heal Me. 2015 and it can be found on viki.com
I recommend it for the multiple personalities performed by the main actor, Ji Sung. I am only seven episodes in and have seen him perform four of his six or seven personalities, but I am surprised by how successfully he transforms from one personality to the other. You have to see it in the original Korean language because his best asset is the change in his voice infliction.
Story is about a chaebol son who tries to hide his disorder by fleeing to the States, but one of his personalities draws him back to Korea where his chaebol family tries to snare him back into the family corporate business. It's not a desire shared by all the family members, so there is an abundance of family conflict. He tries to appease his chairwoman grandmother by promising to stay in Korea for three months, until the time when a major board meeting will take place to define the future of the company, but afterwards, he plans to return to the US. In the three month interim, he seeks help from his psychiatrist's intern to help protect his secret -- but also to protect himself and her, from one of his personalities.
The intern psychiatrist plays a big role in the plot as there might be shared history from a traumatic event that created the multiple personality disorder (called D.I.D. for disassociative identity disorder). And one of the reasons why she keeps crossing paths with the main male lead, is because one of his personalities recognizes her.