Detective Conan S01 E993 Kyogoku Makoto the Understudy (1)

"One truth prevails."

On their way home from watching a movie together, Conan, Ran, Sonoko, Kyogoku, and Sera come across a man armed with a gun who has taken a woman hostage. Thanks to Kyogoku's efforts, the incident appears to be resolved... until he realizes that the man was an actor filming a TV drama. Kyogoku fills in for the actor he knocked unconscious.