Woah... i finished this drama a week ago and i havent been able to stop thinking about it, which is why i feel i have to write a review. I personally love thrillers, action and dramas with deep moral questions and the psychological aspect to people. This was right up my street, and not a single episode disappointed.

Story: We see the formation of the team of criminals, who's job it is to hunt down other criminals. But they are so much more than just emotionless murderers, only there to blindly throw punches and laugh in the face of danger. I have never felt such a connection to characters who have done such bad things! Lee Jung Moon (played fantastically by Park Hae Jin) was my absolute favourite character, he initially comes across as a evil killer but over time as his story develops you see he isn't the cruel psychopath that he seems to be. Honestly i cried more times for him than anyone else, his story is in my opinion the most gripping , you'll have to watch to see why! Jung Tae Soo was also one of my favourites, you see so clearly the guilt he feels for his actions, he's badass and skilled but under all that he really wants what's best. Park Woong Cheol is also a cool guy, alway able to fight his way out of a bad situation and he too is deeply rooted in the criminal world, at one point you see how desperate he is to be normal and that really broke my heart. And finally Oh Goo Tak, always seems drunk and is only set on revenge for his daughter. We really get to see how much his daughter has effected him and even though he does some bad things you cant help but feel sympathetic.
The female officer was annoying at times, but she wasn't so bad that she ruined the whole thing.
Really there are so many twists and turns, every episode builds on the previous events and just when you think you understand something else is thrown in! The characters are built almost perfectly, i cant really flaw them and even if there was a hole it wasn't too detrimental to the overall plot. There were some great action scenes, emotional moments and great chemistry between the whole team (especially Jung Moon, Woong Cheol and Tae Soo, their protectiveness for him was so heartwarming!) , i couldn't ask for more.

Acting/cast: As you probably will guess, i cant say a single bad thing. The cast is picked perfectly, each character feels so real and its all down to the fantastic acting. Park Hae Jin completely embodies the psychopath character, his expressions are perfect, the more i watched him the more pity i felt, he puts across so much with so little words. Ive never watched Hae Jin before but after this i will definitely be watching his other dramas.
The other two criminals are so well played, Ma Dong Seok is super good in his role like usual, ive also never seen Jo Dong Hyuk (well currently in 'Rugal' but nothing else), ill take a look at his work too.
Really kudos to whoever put together the cast, they really found the perfect actors/actresses for the job!

Music: Suited the scenes and really helped add suspense, great!

Rewatch value: like all dramas they're not the same after the first watch. I think i will probably come back to this, simply because of how invested i became in the main 4 characters and their stories.

I really cannot recommend Bad Guys enough, i don't think i can put into words how much i enjoyed it! I will be telling as many people about it as possible, and as its on Netflix i really hope people will give it a chance. I must thank everyone involved with this drama, it was absolutely thrilling start to finish, and so so hard to stop watching. This is my first drama in a while after taking a break and i'm in awe, i feel like i'm mourning having to finish Bad Guys.
Im a bit disappointed we haven't got a second season with the original cast seeing as this was so good, heres hoping they'll do one soon! Thank you, this really was a masterpiece :)