Signal Season 1 Episode 7
We Must Dig Deeper
Jae-han arrests Se-kyu for the serial burglary case, but the culprit is freed after serving a short sentence; Kyung-tae still commits murder.
Guest Stars
Choi Woo-ri
Shin Yeo-jin
Son Hyun-joo
Jang Young-cheol
Jeong Seok-yong
Oh Gyung-tae
Park Si-eun
Oh Eun-ji
Yoo Ha-bok
Shin Dong-hoon