Tunnel is a classic example of a drama which can beat anything Hollywood will ever make.

Though it didn't explain anything about the tunnel itself, the way the story was weaved was enjoyable to watch.
Linking both past and future didn't confuse me as what ALICE did (worst time travel drama for me).

Characters also have great chemistry among themselves. Everyone got a fair share on screen and the camaraderie they have really makes you believe that they are co-workers.

It wasn't difficult to guess how the leads were interconnected but nevertheless, I fully enjoyed this and will recommend it for those who prefer action series rather than rom-coms