Doppleganger(2012)

Doppelgänger is a Japanese drama series starring Nagasawa Masami in a dual role as two identical women whose lives intersect in unexpected ways. When the pair begins investigating the truth behind their mysterious connection, they uncover a dangerous conspiracy involving cutting-edge and illegal medical experiments. As they dig deeper into their origins, the women confront profound questions about identity, ethics, and what it truly means to be alive. The series blends mystery and science fiction as the protagonists navigate a web of secrets that threatens to upend everything they believe about themselves and the world around them.