I have seen a lot of Turkish drama but Kara Para Ask is always my favorite.The story, the cast the shooting, directing were the best. It tells the story of lost diamonds and unknown killer along with beautiful but somehow(childish) love story of Elif and Omer & Metin and Nilufer. THE other reviews have mentioned enough about everything except for the one thing I believe was the real key to this huge success:Tayyar and Metin(Faith) Dundar. The character of Tayyar is new to the drama he represent pure evil a wolf disguised as lamb and his worst deeds was his son Metin. The first is a successful businessman who has charitable initiatives and has wife and son and everyone loves him, but he hides a criminal aspect of organic trading and money laundering. He has a secret son who he adopted as his nephew and made him a criminal and his right hand his nick name is Metin. Metin is young man who was born of a crime (Tayyar raped his mother and then cut her tongue off)and grew up in the dark to become a psycho planning to avenge Tayyar in closest chances. But something happens to change his life forever when he falls in love with his prisoner, which teaches him love and represents for him everything that was missing compassion and innocence. Tayyar relationships and implementation makes his arrest impossible and develops events in the series of trying to solve the mystery of the death of Elife's father and Omar fiancée to reveal the threads about the involvement of Tayyar and Metin and develop at an accelerated pace holding breath until it ends before picking it up.They get to know the truth and discover lots of facts about life,family,friends and love.Although i didn't like the ending very well, i expected better but still was good (for Turkish they adore sad endings so i should be grateful hahaha). The writers innovated unique characters, especially strong mentally, and emotionally eg: Metin: even made him a victim sympathize with others despite his cruelty! we loved the bad boy here , they even called best TV bastard ever . As the director put best selection of scenes and the use of music of genius Toygar ışıklı and generosity in production , the wonderful cast , devoted crew...etc all these elements led to the success of the series and fame. And I disagree with those who say that the reason for success is Omar and Elif love story because the story between them is not new or attractive, same old boring story, and doesn't evolve or give much pleasure or romance. Tuba (Elif) didn't act very well to prove her love to the audience, especially in the second season. The rest of the actors were very good, especially Saygin Soysal, who dazzled people with his successful coup for a psychopathic in love and seeking revenge. Again work does not succeed in the names of heroes even if they are stars, but teamwork and innovation and output and production and writing distinctive are making any series successful or not.