Profile
- Drama: Tunnel
- Revised romanization: Teoneol
- Hangul: 터널
- Director: Shin Yong-Hwi, Nam Ki-Hoon
- Writer: Lee Eun-Mi
- Network: TVN
- Episodes: 16
- Release Date: March 25 – May 21, 2017
- Runtime: 60 min
- Language: Korean
- Country: South Korea
Main cast
| Main cast | Characters |
| Choi Jin-Hyuk | Park Gwang-Ho |
| Yoon Hyun-Min | Kim Sun-Jae |
| Lee Yoo-Young | Shin Jae-Yi |
| Jo Hee-Bong | Jeon Sung-Sik |
| Kim Byung-Chul | Kwak Tae-Hee |
Trailer
Plot
In 1986, Detective Park Gwang-Ho (played by Choi Jin-Hyuk) is determined to catch a notorious serial killer terrorizing his city Tunnel . During a relentless pursuit, he chases the killer into a tunnel. However, when he emerges from the other side, he finds himself in the year 2017, thirty years into the future. To his shock, the serial killer who disappeared in 1986 has resumed the murders in the present day.
Struggling to adapt to the new era and the advanced technology, Park Gwang-Ho teams up with Detective Kim Sun-Jae (played by Yoon Hyun-Min) and Professor of Criminal Psychology Shin Jae-Yi (played by Lee Yoo-Young). Together, they work to uncover the identity of the killer and bring an end to the gruesome murders that have spanned three decades. The story explores themes of time travel, justice, and the persistence of evil across generations.