He is a miner's son who witnessed domestic violence from his father beginning at a very young age. Because of his developmental disorder that's a type of autism, he gets a specialized education at a care center, where they discover that he's a savant. Shi-on has genius tendencies, an exceptional memory, and has a keen perception of space within the human body. With the help of a guardian, he eventually becomes a pediatric surgeryresident, but his personality remains that of a grade schooler.
A pediatric surgeon with a strong sense of duty. She chose to become a doctor after volunteering in a children's cancer ward in high school, and entered Korea's best medical school as the second best of her class. With her hard work and brains she becomes a fellow at a relatively young age. She never hesitates to speak up in front of her bosses, but has an easy-going personality with a tomboyish nature.
The youngest doctor to become a pediatric associate professor. He entered medical school at the top of his class, and is a cold-hearted perfectionist. He blames himself for the death of his developmentally disabled younger brother Su-han, which causes him to treat Shi-on harshly.
Do-han's fiancee. She is a manager on the planning board for a large university hospital. As the only daughter to the foundation's director, she's keenly aware of the nepotism prejudice and proves her worth by being cool-headed, capable, and assertive.
Sungwon University Hospital officials
Chun Ho-jin as Choi Woo-seok, hospital director; He had been with Si On since his big brother died, he was the one who raised him and had been with him until he finished his studes. The one who recommended Si On to the Hospital and would always back him up at all cost.
Ko Chang-seok as Jo Jung-mi, senior nurse A jolly nurse who is one of first friend of Si On is the hospital, had a crush on the head nurse.
Jin Kyung as Nam Joo-yeon, head nurse
Lee Ah-rin as Ga-kyung
Ha Kyu-won as Hye-jin
Kim Hyun-soo as Na In-hae she has intestinal issues and one of Si On's close friends who always give him advise about love and serves as a bridge between Si On and Yoon-seo. She had always trust Si On and even willing to transfer hospital to where Si On plans to work when he was almost fired
Uhm Hyun-kyung as Na In-young
Ahn Sung-hoon as Lee Woo-ram
Yoo Je-gun as Park Ho-suk
Lee Jang-kyung as Kim Ye-eun
Oh Eun-chan as Cha Dong-jin
Yoo Hae-jung as Eun-ok
Jung Yoon-seok as Kyu-hyun
Yoon Yoo-sun as Oh Kyung-joo, Shi-on's mother
Jung Ho-geun as Park Choon-sung, Shi-on's father
Choi Ro-woon as young Shi-on
Seo Hyun-chul as Byung-soo
Jeon Joon-hyuk as Park Yi-on, Shi-on's older brother
Good Doctor made a strong debut on the TV ratings chart. It maintained the number one spot in its timeslot for most of its run, with an average viewership rating of 17.4% (TNmS) and 18.0% (AGB Nielsen).
On November 2013, Good Doctor received an award from the Korean Association of the Welfare Institutes for the Disabled, to thank the entire crew for creating awareness about autism and how socially challenged individuals can contribute to society. On December 2013, the series also received an award from Disability Awareness Campaign Headquarters 2013 and Good Program award by Korea Communication Standard Commisions.