Claim: Saswata Chatterjee does film work.

Saswata Chatterjee -LRB- শাশ্বত চ্যাটার্জী ; also known as Apu -RRB- is an Indian actor of television and films based in Kolkata . Born to actor Subhendu Chatterjee , Saswata Chatterjee began his career with a Hindi serial directed by Saibal Mitra , based on Samaresh Majumdar 's Kaalpurush . He gained popularity by portraying the character of Topshe in a Feluda-based television series directed by Sandip Ray . His acting in many Bengali films has been praised by the critics , including his portrayal of a Ritwik Ghatak-inspired character in the 2013 film Meghe Dhaka Tara . He enjoyed success at the national level in Sujoy Ghosh 's 2012 blockbuster Hindi film , Kahaani , where he played an assassin .