I actually watched the first episode a while back and then started watching it again last week, so it took a few episodes for me to really get invested in the show but overall this was a good drama that I looked forward to watching. Warning: I watched it on Netflix and they blur out some graphic parts but it is still a bit disturbing at times (ie. seeing someone's severed leg) since this is a drama about murder/serial killers so I don't think this would be good to watch too late at night.

This came out around the same time as Signal, when I feel like dramas were really leaning into the time travelling idea but the stories are completely different. In Tunnel, the main character travels through a tunnel to go forward 30 years in time while chasing a serial killer and the whole series revolves around that main story, although the detectives do end up solving a few other cases along the way.

There were lots of of familiar faces in this show, and the acting was great. The plot was interesting and I think the reveals were done well, although some I guessed. There were a few times when I felt like the characters were being stupid, but this was a really solid show, especially for people who like crime and police dramas.