Mad Dog (Korean: 매드독; RR: Maedeudok) is a South Korean television series starring Yoo Ji-tae, Woo Do-hwan, and Ryu Hwa-young.

It aired on KBS2, from October 11, 2017 to November 30, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 16 episodes.

[2] Choi Kang-woo, a former police and leader of Taeyang Insurance's investigators team, decides to create his own investigation team, Mad Dog, after an airplane crash takes the life of his wife and son.

Two years later, he meets Kim Min-joon, a genius former swindler who is the younger brother of Kim Beom-joon, the co-pilot of the crashed JH 801 airplane, who was accused of crashing the aircraft on purpose in a suicide attempt.

Gong Myung was initially offered the role of Kim Min-joon.