Jaane Jaan, released internationally as Suspect X, is a 2023 Indian Hindi-language mystery thriller film written and directed by Sujoy Ghosh. The film is an adaptation of the 2005 Japanese novel The Devotion of Suspect X by Keigo Higashino, which had earlier been made into the 2012 South Korean film Perfect Number by Bang Eun-jin. The film is produced under the banner 12th Street Entertainment and Northern Lights Films in association with Kross Pictures and Balaji Motion Pictures. It stars Kareena Kapoor Khan as a single mother involved in a murder, alongside Jaideep Ahlawat and Vijay Varma. It released on 21 September 2023 on Netflix, to positive reviews from film critics, with particular praise directed towards the performances of the lead cast.