Sisyphus: The Myth () is a 2021 South Korean television series starring Cho Seung-woo and Park Shin-hye. Labeled as "JTBC's 10th Anniversary Special Drama", it aired on JTBC from February 17 to April 8, 2021; each episode was released on Netflix in South Korea and internationally after its television broadcast every Wednesday and Thursday at 21:00 (KST).
Synopsis
A series of unexplainable events introduces a famous engineer and physicist (Cho Seung-woo) to dangerous secrets, and a beautiful woman (Park Shin-hye) from the future has come looking for him. Together they must break the time loop to prevent a war from happening.
Cast
Main
Cho Seung-woo as Han Tae-sul
Jung Hyeon-jun as young Han Tae-sul
A genius engineer, quantum physicist, CEO and co-founder of the company Quantum and Time. Rude and arrogant at first, Tae-sul later becomes more understanding after meeting Kang Seo-hae. After saving the flight he was on from crashing, he learns of a conspiracy to start a war and realises his brother's apparent death might not have been true. Park Shin-hye as Kang Seo-hae Seo Yi-soo as young Kang Seo-hae A mysterious woman from the future intent on saving the war ravaged world from destruction. Seo-hae is the daughter of Kang Dong-ki. She has lived in a bunker for eight years before coming out to explore and scavenge the war-torn Korea. A battle-hardened elite warrior, she travels to the past to save Tae-sul from death and prevent him from inventing the Uploader, a time machine capable of sending people and things to the past.
Supporting
Heo Joon-seok as Han Tae-san
Cha Sung-je as young Han Tae-san
Tae-sul's protective older brother who has supposedly died. Tae-san faked his own death to track down Sigma, whom he has found out to be Tae-sul's former classmate, an investor who contributed to the rise of Quantum and Time, and the mastermind behind the future war. Chae Jong-hyeop as "Sun" / Choi Jae-sun A former restaurant worker who becomes wealthy with Seo-hae's help. He hopes for romance with Seo-hae but, after being rejected, accepts friendship and treats her like a sister.
Quantum and Time
Tae In-ho as Eddie Kim / Kim Seung-bok
Co-CEO of Quantum and Time and Tae-sul's best friend, their friendship drifts apart due to Tae-sul's erratic behavior and Eddie's connection with the financiers taking over Quantum and Time. Jung Hye-in as Kim Seo-jin / Kim Agnes A psychiatrist and daughter of the chairman of Quantum and Time, Kim Han-yong. Seo-jin dated Han Tae-sul before becoming the fiancée of Eddie Kim. She and Eddie would later break up. Like her father, Seo-jin is in league with Sigma. A future version of her, named "Agnes", has crossed over to the present and operates an orphanage for children who came from the future. Agnes is part of the Advance Team. Jeon Gook-hwan as Kim Han-yong The chairman of Quantum and Time and Seo-jin's father, he aids Sigma in exchange for treatment for his wife, who has amyotrophic lateral sclerosis. Tae Won-seok as Yeo Bong-sun Tae-sul's loyal assistant and bodyguard. Bong-sun was left in a vegetative state after the shooting at the Busan Expo. He awakes during the war and learns of Tae-sul's death. He tries to change the future when Seo-hae encounters him on her way to the Uploader.
The Control Bureau Team 7
Choi Jung-woo as Hwang Hyun-seung
The head of the 7th division of Immigration and Foreign Affairs, also known as the Control Bureau. He is a former National Intelligence Service agent. Yang Joon-mo as Choi Yeon-sik A high-ranking agent in the 7th division of the Control Bureau. Go Yoon as Jung Hyun-gi A new recruit to the Control Bureau agent and a former cop. Hyun-gi is intent on killing Seo-hae after being told that she killed his mother. He is also a former colleague of Kang Dong-ki. Park Young-bin as Kwon Hyuk-bum An agent in the 7th division of the Control Bureau. Lim Ji-sub as Ma Yong-suk An agent in the 7th division of the Control Bureau.
Asia Mart
Sung Dong-il as Park Hyeong-do
A man from the future who runs Asia Mart, a convenience store that secretly works with time-travelers from the future. He is a member of the Advance Team. Jung Ha-joon as Uhm Seon-ho Lee Myeong-ro as Uhm Seon-jae Seon-ho and Seon-jae are two young men working for Hyeong-do. Lee Si-woo as Lee Ji-eun/Bingbing Park Hyeong-do's long lost biological daughter from the future. She came to the past ahead of her mother and has been waiting ever since. Her true identity would be revealed to Hyeong-do by Tae-sul.