Signal Season 1 Episode 12
Overview
Park Hae Young becomes the prime suspect for the Section Chief’s murder. Meanwhile, Lee Jae Han must find out who this “one” is before it’s too late.
Director: Kim Won-suk
Guest Star: Hong Boo-hyang, Jeon Su-ji, Kim Hak-sun, Kim Woo-seok, kim-hak-seon, Lee Jin-kwon, Seo Ji-hoon, Shin Yi-Joon, Sung Ki-yoon