Tapan Sinha was one of the most prominent Indian film directors of his time forming a legendary quartet with Satyajit Ray, Ritwik Ghatak and Mrinal Sen. He was primarily a Bengali filmmaker who worked both in Hindi cinema and Bengali cinema, directing films like Kabuliwala, Louha-Kapat, Sagina Mahato, Apanjan, Kshudhita Pashan and children's film Safed Haathi and Aaj Ka... Wikipedia