Blocked Fog (立ちはだかる霧) is the 124th episode of the Katekyō Hitman Reborn! anime series.
Chrome was revealed to have impersonated a person in the base. Yamamoto is defeated by Genkishi who reveals the room they were fighting in had steel walls covered by the mist causing Yamamoto to run into one of them. Gokudera and Gamma unleash their final attack.