Satyawadi Raja Harishchandra by Dadasaheb Phalke was the first full length feature film in India. But it was in the 1930s, with the introduction of sound in Alam Ara, that cinema took the first steps to melding itself into an essential part of the Indian identity, eventually evolving into the behemoth called Bollywood.. As Indian cinema completes 100 years, here is a look at the greatest movies from the 1930s and 1940s.