Watch FMovies. Magno Mainak is a 2009 crime thriller based on the novel of same name by Sharadindu Bandyopadhyay. It was directed by Swapan Ghosal and produced by New Wave Communications. This is the third Byomkesh Bakshi film adaptation. Subhrajit Dutta played Byomkesh while Rajarshi Mukherjee played Ajit. Piyali Munsi, Rupanjana Mitra, Gargi Roychowdhury and Biplab Chatterjee acted in other roles.