Just finished the last episode of this drama and I immediately had to make a blog post. This drama is ineffable. It is the pinnacle of everything I expect from a drama, and it blew my expectations to tell you the truth. The genres coalesce in this drama, and I went through a literal catharsis watching episode 15 in particular. Now, I'm going to dissect this drama... Crime: The 3-4 cases this series is based on are REAL COLD CASES. These kidnappers, murderers, and rapists are on the loose to this day. It sickens me but I really like how they did those cases justice. There is so much commentary on current society about police and corruption. Our society, despite its progress, is still muddled with corruption and Lee Jae Han was definitely a shining beacon in this drama, demonstrating how our justice system should really be. Anyway, the writing for these cases was spot on. Mystery: I find the cases well paced; they were timed with enough suspense but weren't stretched out. I initially thought this series would only focus on one case but I really appreciated that it was a mix of cases that in reality were all connected. This series was really unpredictable in how the cases would be solved & who would survive or die (as the past can change and those who died could still live and vice versa). I was on my toes dying to know what would happen til the very last minute of this drama. Time-Travel: THIS WAS EXECUTED SO WELL. I love the complexity of the time-travel and how a subtle change in the past can amplify in the future; it was realistic for an unrealistic concept. The writers handled the shifts in the past and present so well & I couldn't even follow at points (which I think is a very good quality, if a drama can outsmart me haha). Definitely made this drama stand out! One thing I'd say is that if I was Hae Young on the walkie-talkie, I'd cram so much info in that minute they talked haha. The time-travel (if you can really call it that) was also perfect because you got a balance of present day and 80's dramas (which people desire like in Reply 1984. Reply 1988, etc.). You get very two very different vibes in the same drama which really caters to different interests. Romance: This is so subtle. Don't go into this drama expecting a romance because you really won't get anything. It's just a little heartwarming seeing scenes where the main female lead pines over Jae Han. You get to see the care they have for each other. This definitely made the drama a little lighter from its heavy subject matter but I still respect how the romance was put on the side. This drama really needed to focus on the cases and the justice needed to be served which it did! Characters/Acting: I honestly have nothing but praise for the actors. Cha Soo Hyun in particular. This character was stunning; the complexity of the character arc and the contrast of her past self and present self were acted perfectly by Kim Hye Soo. Her acting as a victim was great as well. The main lead, Park Hae Young, I also really enjoyed. He's relatable and real, and he can act! I really appreciate how this drama wasn't about having a flower boy lead; I could really focus on the character! And Lee Jae Han stole my heart really. He's such a strong spirit with bright morals; he definitely shone in the drama and had really great, passionate monologues. Awesome acting from the main leads! And Kim Bum Joo... what a despicable character. Well done, I guess. And there's another character, Ahn Chi Soo, who has a really complex character arc throughout the series... I just appreciate the depth each character has... amazing job writers! Plot/Writing: As I've alluded to before, this series is well paced. I find everything unpredictable and nothing dragged. Nothing was too confusing and the series had an appropriate amount of flashbacks. This drama didn't have any typical kdrama plot devices and the writers definitely aren't scared to wring your heartstrings a little... I cried 6 times in an episode! Everything in the story is so intricately woven, I can't help but wonder if they planned all of this since episode 1. No episode was subpar compared to the rest; each episode got better and better which is truly rare. I just can't get enough. OST: Very subtle OST that fits the theme of this drama. It's very heartwarming and like one of a "family" drama I guess. It sounds like home to me. Overall, I am so in love with this drama. The ending definitely was open-ended so I am desperate for a season 2. My only fear is that it might not live up to season 1. Give this drama a go, I promise it won't disappoint!