Then comes 'பா' serious directors ,who became very successful and changed the face of Tamil cinema..Balu Mahendra ,Bharathi Raja ,Bhagya Raj ,Pandiya rajan ,Parthipan .Interestingly except Balu Mahendra ,all others from Bharathi raja tree. Shall we discuss the significance of these 'பா வரிசை இயக்குநர்கள்'?