Watch Professor Shanku O El Dorado for Free: How to Stream the Movie Online at 123Movies. . Based on Satyajit Rayʼs iconic character, this film portrays the story of Trilokeshwar Shanku - a respected scientist and inventor who travels to Brazil for a science convention. But once he`s there Shanku gets involved in an adventure, a quest for the mythical city of El Dorado. Through the journey, he encounters native tribesmen and anacondas, but will Shanku and his friends ever find El Dorado?