In the recent past of Bollywood history, two sub-genres have become popular enough for filmmakers to experiment with them more than once - one is the women-centric movie (think Queen, Kahaani, etc), and the other is the mystery thriller (think Samrat & Co. etc). Producers Dia Mirza and Sahil Sangha go one step further when they take Vidya Balan (who is responsible for the success of the first genre, in some way) and put her in a movie that requires her to play a detective.
The last time Vidya Balan tried a comedy (Ghanchakkar), it sank without a trace. She is best known for her....