It's like a package, and viewers are in for a treat seeing good-looking actors and actresses portray geniuses, such as these actors - from Park Bo Gum to Lee Jong Suk and more - who transformed into brainiacs in their respective dramas!

Who's your favorite genius?

Han Jin Woo - 'God's Quiz'

"God's Quiz" lead star Ryu Deok Hwan, in character as a medical examiner, deals with rare diseases. He works and helps in solving criminal cases that involve offenders carrying rare conditions. His character and credibility in his work often gives new insights to viewers about rare illness.

Teacher Kim - 'Dr. Romantic'

Portrayed by Han Seok Kyu, Teacher Kim is a genius surgeon who calls himself "Romantic Doctor" and enjoys life in seclusion. He was once a famous doctor but he suddenly disappeared without anyone knowing why.

Kim Yoon Hee - 'Sungkyunkwan Scandal'

Park Min Young's character in this drama has great intellect; hence, she opted to disguise as her brother to earn money. With her cleverness, she enters a reputable school with future politicians as she proves her worth.

Baek Seung Yoo - 'Melancholia'

Baek Seung Yoo (Lee Do Hyun) was a math olympiad and even got accepted to MIT in the United States when he was only 10. At age 12, he suddenly disappeared. Years later, he meets Ji Yoon Su (Lim Soo Jung), a math teacher who palpitates when it comes to hard mathematics questions.

Park Shi On - 'Good Doctor'

Joo Won plays a high functional autistic who desires to be a pediatric surgeon. Being good at what he does despite his disability brought a lot of judgement. He works hard to prove his abilities to his colleagues who see him like a child.

Lee Yeong Oh - 'A Beautiful Mind'

Lee Yeong Oh (portrayed by Jang Hyuk) is a genius neurosurgeon, but lacks empathy because of his antisocial personality disorder. Then, a series of patient deaths at the hospital where he works at causes him to probe, alongside policewoman Gye Jin Sung (Park So Dam).

Choi Taek - 'Reply 1988'

Park Bo Gum is a genius Go player who competes internationally and tops news headlines for his achievements and for representing Korea. Despite his fame, he stays humble and lives a simple life with his father and friends.

Park Hoon - 'Doctor Stranger'

Lee Jong Suk is a genius thoracic surgeon in this medical drama. He works in a hospital where power and intelligence gets the number one spot among doctors.

Dr. Park works hard and proves his great skills against other surgeons while resents his life experience of escaping North Korea.

Yoon Tae Yi - 'Alice'

Kim Hee Sun is a genius scientist who immerses her whole life in studying time travel. In her quest to find more about its existence, she meets a detective who had past encounters with time travellers.

They then work together to prevent time travellers from causing destruction to the present life.

Han Ji Pyeong - 'Start-Up'

Han Ji Pyeong, portrayed by heartthrob Kim Seon Ho, is an investment genius. He used his brains to get himself out of poverty, having been orphaned at a young age, and to return the kindness Seo Dal Mi's (Suzy) grandmother showed him.

He soon becomes the mentor of mathematics genius Nam Do San (Nam Joo Hyuk) in establishing his start-up company Samsan Tech.

Do you know other K-drama stars who portrayed genius characters? Tell us in the comments!

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