is directed to undergo psychotherapy in a mental hospital and will be eligible for release when cured. When Ambi is released two years later, his rigid adherence to protocol has diminished and he appears more open and accommodating. He marries Nandini. and while travelling on a train during their honeymoon, Ambi notices a man (an electrician who was indirectly responsible for his sister's death several years ago) drinking amidst fellow passengers. Moving himself and Nandini away from the man, he secretly transforms into Anniyan; makes his way back to the compartment and throws the man off the train, killing him. However, he hides the incident from Nandini, revealing that instead of Ambi eradicating his other personality, both have blended into one identity. Cast Vikram as Ramanujam "Ambi" Iyengar / Remo / Anniyan Sadha as Nandhini Krishnan, Ambi's love interest turned wife(voiceover by Kanika) Prakash Raj as DCP Prabhakar Vivek as Chari, Ambi's friend and Sub-Inspector Nedumudi Venu as Parthasarathy Iyengar, Ambi's father (voiceover by S. N. Surendar) Nassar as Vijaykumar, Ambi's psychiatrist Cochin Haneefa as a delinquent car owner Kalabhavan Mani as Ponnambalam, a covetous landlord Sairam Sukumaran as P. A. Bhirama Charle as a wastrel Shanmugarajan as Chockalingam, the railway contract caterer, DCP Prabhakar's brother Saurabh Shukla as Ethirajan Naidu, the brake cable company owner Yana Gupta as Club dancer (Item number in the song "Kaadhal Yaanai") Manobala as the Ticket Conductor on the train to Thiruvaiyaru Shanthi Williams as Susheela Iyengar, Ambi's mother Neelu as Ananthanarayanan, secretary of the Sangeetha Academy Sriranjini as Nandhini's mother (voice dubbed by Meera Krishnan) Vatsala Rajagopal as Ambi's grandma Mohan Vaidya as Krishnan, Nandhini's father Viraj as young Ambi Divya Nagesh as Vidya, Ambi's late sister Citizen Mani as a cook who works under Chockalingam P. Unnikrishnan Cameo Appearance as singer in Thyagaraja Festival Master Wong as Karate Master Stunt Silva as a passerby (Uncredited) Production Pre-production During the making of his Hindi film directorial debut Nayak starring Anil Kapoor in early 2001, director S. Shankar had conceived a science fiction film titled Robot. A futuristic techno-thriller set in the 22nd century Chennai, the film was to star Kamal Haasan and Preity Zinta. However, after completing a photo-shoot featuring the two, the production was shelved due to various reasons, including Haasan's unavailability of dates and creative differences with the director. Shankar postponed the project indefinitely and made the coming of age film,