How many movies have Biplab Bandyopadhyay and Swapan Ghosal collaborated on?

They have worked on 3 movies together! Their first movie together was Byomkesh O Barada (2012) while their highest rated movie together was Bishupal Bodh (2015). They have not worked together since Bishupal Bodh (2015). They are most known for their mystery films together.