Fi is a first internet TV series in Turkey, the Turkish psychological thriller television series originally streamed online by puhutv. It is an adaptation of award winning author Azra Kohen's trilogy novels , , and . Its first season consists of 12 episodes which were released from 31 March 2017 to 16 June 2017. The second season started in October 2017. Within 50 hours of the first three episodes being released, it reached 3.5 million viewers. The first 9 episodes reached 50 million viewers. According to statistics that were collected by various Turkish agencies, among the 48 million Internet users in Turkey, the number of users watching Fi at the time was 8 million. The second season of the series have a different story than the books. This became a big problem for the readers and followers of Azra Kohen. The author canceled the series due to fact that the production company did not adhere to the original plot and depth of content of the trilogy and sue the production company Ay Yapim. The case is still in court (2022). Plot In season one, the life of psychiatrist Can Manay is explained. Manay teaches psychology in college and also performs therapy on his own television program. He falls in love with Duru, a young and aspiring dancer, whom he meets by coincidence, but Duru has a lover named Deniz, a talented musician. Also where he teaches at school, he has a student named Bilge, whom he believes will become a good psychologist and he pushes her boundaries. On the other hand, Özge Egeli, an ambitious young journalist, is determined to reveal the dirty past of Can Manay. Cast and characters Main characters Can Manay (Ozan Güven), the leading psychiatrist of Turkey and the host of the most watched television program. Can Manay's normal life changes when he meets Duru and falls in love with her. Duru Durulay (Serenay Sarıkaya), she is a conservatory student and her only dream is to dance and to be on stage. She lives with her boyfriend Deniz. Before finishing school, she is accepted to the New York Academy through Can Manay's help, who sends a video of her dancing on stage to the academy in New York. She has a strong sense of style with pastel shades and simple jewelry. Deniz (Mehmet Günsür), a university teacher and a composer who prepares dance shows. He has