The research was done in accordance for the need to make sure certain historical events and their representation in the movie was aptly and factually correct.
Also, two of the scholars were specially appointed to teach and educate the cast, which includes Vinay Pathak, Konkona Sen Sharma and Ranvir Shorey, about the history represented in the film.
"This research was rarely done in Indian biopics and this was the right way to go about recreating a not so recent past," Konkona said in a statement.
The minute detailing that the research threw up, took the 35-year-old into a different space and time, helping her immensely with elements that could enhance her character study.
The film, which encompasses the past in a stinging modern day satire on free India through the eyes of the freedom fighter Gour Hari Das is scheduled to release on August 14.