Tunnel S1, E2

A detective follows the trail of a serial killer 30 years into the future and teams up with detectives in that time period to find the culprit.

Cast:Choi Jin-hyuk , Kang Suk-Won , Yoon Hyun-min , Jo Hie-bong , Kim Min-sang , Kang Ki-young , Lee Yoo-young , Lee Shi-Ah , Suk Mun , Cha Hak-yeon , Heo Sung-tae , Se-hee Kim , Tae-Yeop No , Kim Byeong-cheol , Joo-ho Yang , Jo Seung-yeon , Lee Yong-nyeo , Son Yeong-soon