The film was partially inspired by the real life case of K.M. Nanavati, a respected officer in the Indian Navy who shot his wife's lover in 1959. The case received unprecedented media coverage.
Rustom 2016 was partially based on this film.
This movie was a box office hit.
Director Raj N.Sippy who directed films like Inkaar, Satte Pe Satta, Satyamev Jayate etc was the assistant director of Gulzar and also one of the producer of Achanak. Later Raj N.Sippy made completely different films from Gulzar's film.
Film was shot in 28 days.