I really admire time-travel shows done right and Kairos is definitely one of those!

The plot is solid and refreshing even within the time-travel genre, and a brave attempt is made to explain the reason behind the time travel phenomenon and how and why it was the way it was. It's very tightly written and the pacing throughout the show is very well done and keeps you on the edge of your seat throughout the 16 episodes.

I like the direction and the frequent shift between past and future scenes were depicted clearly with warm and cool tones and I was never left questioning which time period I was watching. The added date to the bottom of the screen to show the actual timelines was an added bonus that helped determine the passage of time while watching the show.

The acting was on point with the four leads doing very well. I loved Shin Sung Rok and Le Se Young's acting in this and will be looking forward to their next roles.

The music is okay, nothing remarkable but it fits the theme and tone of the drama.

All in all a very satisfying watch and highly recommended, especially for thriller K-drama watchers.