Kaisa Yeh Junoon (English: "What is this obsession?") is a Pakistani television series directed by Raana Sheikh, who also wrote the screenplay with dialogues by Haseena Moin. It first aired in 2008 on ARY Digital and focuses on the subjects of terrorism and religious extremism. The series has Azfar Rehman, Ayesha Omar, Adnan Siddiqui, Madiha Iftikhar, and Savera Nadeem in leading roles.
It received three nominations at the 8th Lux Style Awards, including Best TV Play - Satellite.
According to director Raana Sheikh, she was first asked to direct the series in the Indian style, with over-the-top and exaggerated production. The series marked the acting debut of Rehman and his first appearance with Omar, the others being Roza Kay Rozy, Miss U Kabhi Kabhi, and Bisaat. The series marked the appearance of Bollywood actress Kiron Kher, who played the supporting role in the series in her first Pakistani TV drama.
The series was shot in London, Bombay, and Karachi.