Oru Kaidhiyin Diary is a 1985 Indian Tamil-language action thriller film directed by Bharathiraja and co-written by K. Bhagyaraj. The film stars Kamal Haasan, Radha and Revathi. It was released on 14 January 1985, and completed a 175 day run in theatres, becoming a silver jubilee film. The film was remade in Hindi by Bhagyaraj as Aakhree Raasta (1986), and in Telugu as Marana Homam (1987).