Lee Do-hyun

Role: King Sejong

The reign of King Sejong the Great — not the history-book version, but the man: the battles with his court, the resistance from scholars who saw the creation of…

Role: Choi Kang-ho

A cold, ruthless prosecutor is gravely injured and regresses to the mind of a child — and his fiercely tough-love farmer mother must learn to care for him all o…

Role: Joo Yeo-jeong

A woman meticulously plots revenge against the bullies who destroyed her life in high school.

Role: Hwang Hee-tae

A med student and a nurse fall in love during the Gwangju Uprising of May 1980.

Role: Baek Seung-yoo

Ji Yoon-soo was a rising math prodigy in her youth whose career was derailed by a false accusation. Fifteen years later, she's a high school math teacher at an …

Role: Hong Dae-young (18)

A middle-aged man on the verge of divorce wakes up 18 again and must decide if he wants to reclaim his past.