I wanted to watch it when i saw the trailer but waited for it to finish airing since the genre is thriller.. i didnt want to bite my nails for an entire week to see what happens next and i am glad i did coz most of the episodes ended with a cliffhanger and makes you want to watch the next episode asap..

this one is a well written, well-directed and well-acted drama which stayed true to its genre till the end without any dragging or rushed ending.. i liked how they stayed true to the ML's personality disorder till the end and made it look believable.. he didnt change to a completely different person and it wasn't flowers and butterflies for the couple.. he was never treated properly for his disorder and it took him more than a decade to realise his true feelings for the FL.. so it was believable that he didnt change completely till the end..

the FL was very rational and logically and didnt end to conclusions on her own.. when she found out his real identity she went out to find the reason behind it and didnt belive everything till she got enough proof which is quite rare to see.. FL's most of the time act impulsive and get to conclusions on their own.. she was strong as well as emotional..

the leads had amazing chemistry and they complement each other well.. i have only seen lee joon gi in moon lovers and moon chae won in the movie mood of the day but liked their acting.. all the scenes b/w do hyun soo and his daughter was heartwarming to see.. lee joon gi was amazing.. he perfectly gave out the creepy vibe at the start and then got the audience emotional by the end.. moon chae won also did her part amazingly.. the difference b/w detective cha and a wife and mother were very evident.. she is like the pampered wify at home and a smart detective at work..

i loved the dynamo b/w cha ji won and her colleagues esp with the one who always have a different opinion than her.. they all truly cared about each other and supported each other..

both do min soo and baek hee sung had the creepy vibe from the start and they look believable as psychopaths..

i thought after jung mi sook was revealed to be alive i thought they will show a reunion with her husband.. after all the guy went psycho looking for her and never gave up.. that was a loose end..

i had more expectations from the mother.. she seemed to be the only one with some kind of humanity left in her and she seemed to like do hyun soo's daughter.. but after a point she got blinded by the love for her psycho son and helped him cover up murder and also trap do hyun soo..

i really felt bad for kim moo jin when do hae soo left but i hope the makers kind of indicated they will be together in the future. he did screw up in the beginning but then he was only a teenager at that time.. he was the funniest character..

overall its an amazing drama with little to no flaws and keep the audience interested till the end..