The Accidental Detective () is a 2015 South Korean action comedy film directed by Kim Joung-hoon. It was released on September 24, 2015. The crux of the film is loosely inspired from Strangers on a Train. A sequel, ', has been made and released on June 13, 2018.
A true-crime enthusiast, Dae-Man (Kwon Sang-Woo) and a Sr. Detective Noh (Sung Dong-Il) now demoted under his Jr. investigate together to find the true murderer their friend is accused of.