Mastar Alankar as Dipu, Jasjit's son Production Producer and cinematographer Nariman Irani was in a financial mess when his film Zindagi Zindagi (1972), starring Sunil Dutt flopped. He was in debt for Rs 1.2 million and couldn't pay the money off on a cinematographer's salary. When he was doing the cinematography for Manoj Kumar's major hit Roti Kapada Aur Makaan (1974), the film's cast (Amitabh Bachchan, Zeenat Aman, Pran) and crew (assistant director Chandra Barot) decided to help him out. They all recommended that he produce another film and that they would participate in its production. They all approached scriptwriting duo Salim–Javed (Salim Khan and Javed Akhtar), who gave them an untitled script that had already been rejected by the entire industry. The cinematographer Nariman Irani, while working on Chhailla Babu, decided to borrow most of the plot of Chhailla Babu and shared a modified story idea with Chandra Barot, who made the new modified story as the film Don (1978). The script had a character named Don. Bachchan would play Don, and Barot would direct the film. Aman and Pran would play key roles in the film. The film took three-and-a-half years to complete. Before filming was completed, producer Irani died from an accident on the set of another film he was working on. Barot faced budget restraints but received aid. Barot showed the film to his mentor Manoj Kumar, who felt that the film was too tight and needed a song in the midst of the action-filled film, and so "Khaike Paan Banaraswala" was added into the film. Don was released without any promotion on 12 May 1978 and was declared a flop the first week. Within a week after an adding the song "Khaike Paan Banaraswala", the song by itself became a big hit, and by word of mouth spread, so by the second week, the film's fortunes were reversed, and the film was declared a blockbuster. The profits from the film were given to Irani's widow to settle her husband's debts. The hit-song "Khaike Pan Banaraswala" sung by Kishore Kumar was choreographed by P. L. Raj. Don was produced on a budget of 70lakh ($860,000). Adjusted for inflation, its budget is equivalent to $ million (22crore) in 2016. Soundtrack The soundtrack of the film has been composed by the duo Kalyanji–Anandji, while the lyrics were written by Anjaan and Indeevar. According to film music expert Rajesh