Train

Not kidding i don't want this drama to end. Oh my god, i have watched like 50 korean dramas, in fact, more. The direction is fine but the story really is the hero. The actor in the lead role does it so well. It is a treat to watch it.

I'm not really a sci-fi fan, so I wasn't expecting much when I started this drama, but I was hooked from the start.

The drama moves smoothly, avoiding many plot holes that most of these dramas fall in, you'd expect you found one and it turns out to be part of the plan or an unexpected plot twist.

I've known Siyoon first from Psychopaths' Diary, so it took me the first 4 episodes to not laugh everytime he has a serious expression, but he's a good actor and did well in this role.

The only part I didn't like much was how rushed the ending felt. They left unexplained bits that don't affect the overall plot, but still made the last 20 minutes feel like the director was saying "You get the idea now, you'll figure it out". Which isn't so bad, it might have dragged a bit otherwise, so all in all, it's one of the best shows with that idea.

The base concept is different. In tunnel it's about time travel, while in Train, it's about traveling between alternate realities. Even so, there are numerous similarities, which you'll recognize if you watch both shows.

Overall, it's a mysterious show that stays interesting throughout.

I really enjoyed this series, the acting and script is first rate... I have enjoyed all the time travel Korean shows but this one is the best, maybe cause it's 12 episodes only... The lead actors are superb and I have watched now about 25 plus Korean dramas and this us definitely near the top with Mr Sunshine, Misaeng, Heachi and Stranger. Definitely recommended this series

This was one of the first KDrama's I have watched while it aired, and let me just say that every episode kept me on the edge of my seat, and I was SO disappointed having to wait each week for the next two episodes! Yoon Shi Yoon is quickly becoming a favorite actor of mine; he has quite the range and this really showed when playing the two different versions of the Seo Do Won. He had a similar acting experience in "Your Honor," where he played twin brothers, but this show and these characters were much better in my opinion. The plot is complex but well paced and understandable, and much better done than "The King: Eternal Monarch" which had a similar premise but was executed in a much more confusing manner. This is also one of the first KDrama's that I have watched that hints at/needs a second season - very badly! Overall this was a very enjoyable watch with great acting, well developed characters, and an addictive plot.