Anusandhan (') is a 2021 Indian Bengali-language psychological thriller film directed by Kamaleshwar Mukherjee produced by Big Screen Productions. Starring Saswata Chatterjee, Churni Ganguly and Joydeep Mukherjee, the film is an adaptation of a play directed by Kamaleswar himself. The movie is an adaptation of the 1956 novel A Dangerous Game by Friedrich Dürrenmatt which has earlier been adapted in Marathi as Shantata! Court Chalu Aahe (1971), in Kannada as Male Nilluvavarege (2015) and in Hindi as Chehre (2021). The film was released theatrically on 3 December 2021.
The production crew and cast of the film flew to London on 13 September 2020 for London schedule of filming. The filming post COVID-19 pandemic resumed in various locations around London on 16 September 2020. The schedule was wrapped up in September end.
Soundtrack is composed by Anupam Roy on his own lyrics. The single track was released on 20 November 2021.