Kaththi (English: The Knife)Indian Tamil action drama film

Kaththi (English: The Knife) is a 2014 Indian Tamil action drama film written and directed by AR Murugadoss. The film stars Vijay in dual roles while Samantha Ruth Prabhu, Neil Nitin Mukesh, Tota Roy Chowdhury and Sathish play supporting roles. Anirudh Ravichander composed the film's soundtrack and score. Cinematography was done by George C. Williams and the film was edited by A. Sreekar Prasad. Lyca Productions and Ayngaran International bankrolled the venture and Eros International purchased the theatrical and audio rights for the film. The story revolves around the tale of Kathiresan and Jeevanantham who are lookalikes and focuses on the issue of farmers committing suicide due to corporate encroachment. The film, which commenced filming in January 2014 in Kolkata, was released on 22 October 2014 worldwide, coinciding with the festival of Deepavali. Upon release, the film opened to mostly positive reviews from critics[4] and was the highest grossing Tamil film of 2014.

n Kolkata, prisoner Kathiresan "Kathir" (Vijay), a petty criminal, helps the police capture an escaping prisoner Vivek Banerjee (Tota Roy Chowdhury), but he himself escapes afterwards. He goes to Chennai and decides to escape to Bangkok with his friend and fellow-criminal Ravi (Sathish). However, he drops this plan after meeting and falling in love with Ankitha (Samantha Ruth Prabhu) at the airport, who dupes him into believing that she wants to marry him after realising that he is having a crush on her. Later, Kathiresan and Ravi notice a man who resembles Kathiresan named Jeevanandam "Jeeva", being shot by a group of thugs. They admit him to hospital, following which Kathiresan decides to impersonate the injured Jeevanandam to escape from the police. Under the name of his doppelgänger, Kathiresan and Ravi enter an old-age home run by Jeevanandam with the aim of collecting ₹25 lakhs (which is meant for the inmates of the old-age home) for their Bangkok trip, until he learns about his doppelgänger's mission. Jeevanandam is a communist ideologue and a post-graduate in hydrology from the arid village of Thanoothu in Tirunelveli district who had discovered groundwater under some lands of the village which could be used as an irrigation source not only for the village, but for the entire Tirunelveli district and the neighbouring Thoothukudi district as well. But, an MNC owned by Chirag (Neil Nitin Mukesh) cheated the villagers into giving their lands for the construction of a factory. Jeevanandam was arrested by the police and the six villagers as for convince the issue with media and release of Jeevanandham commit mass suicide. On learning of the plight of Jeevanandam and the villagers, Kathiresan decides to fight for their cause while still under the name of Jeevanandam. The people of the old home and Kathiresan go to the jury and try to convince him to go in favour of them, but Kathiresan starts stating rules and scares the main jury person (whom Chirag had bribed). Kathiresan then sends a person (disguised as a hairdresser) to Chirag and makes him lay a fingerprint on Chirag's neck. After that Chirag sends 50 men to kill Kathiresan but he soon defeats them using the coins the villagers gave when he was attending a ceremony for him.

Meanwhile, the real Jeevanandam gains consciousness and finds himself in the Kolkata prison where Kathiresan was locked up. With the help of Vivek, who has heard his story and has plans to kill Kathiresan in revenge for getting him caught and thrown back into prison, he soon escapes along with Vivek's henchmen.

Not knowing that Jeevanandam and Vivek's henchmen are headed for Chennai, Kathiresan makes efforts to convince the media to bring the plight of the villagers to national consciousness, but the media is not interested as they feel that it is not a sensational news. A few days later, at the Madras High Court, the judge declares the verdict in favour of Jeevanandam and the villagers, but adds that Chirag has claimed that certain villagers who are working abroad have shown their support for the factory. If they cannot prove that their support was faked by Chirag within the next five days, the verdict will then go in favour of Chirag and the villagers will lose their lands. Since the villagers, who have denied supporting the factory, are abroad and cannot come to Chennai within five days to rebut Chirag's claims as their passports are held by their contractors, and the verdict is to be decided within five days, Kathiresan decides to take drastic measures to sensationalise the issue. He, Ankitha, Ravi and the inmates of the old-age home block water supply to Chennai by sitting on the pipelines which carry water to Chennai from five lakes. With the plight of the Chennaites due to no water supply having gained national attention, Kathiresan comes out of the pipeline after a few days and highlights the villagers' plight in an emotionally charged speech to the media, which is telecast nationwide and moves many people. By now, Kathiresan has discovered that Jeevanandam has escaped and is searching for him.

Meanwhile, Jeevanandam and Vivek's henchmen reach Chennai, but Jeevanandam is soon kidnapped by Chirag's henchmen. While in Chirag's custody, he sees Kathiresan's speech on television and is moved by the efforts made by his doppelgänger to help the villagers. On the night before the verdict, Kathiresan's bluff is exposed, but Kathiresan assures the old men that he is genuinely interested in their cause, that Jeevanandam is alive and that he will rescue Jeevanandam from Chirag and hand him back over to the villagers with the assurance of a positive verdict. Kathiresan goes to Chirag's office, where Jeevanandam is being held. He rescues Jeevanandam and fights Chirag and his henchmen, killing Chirag in the process.

The next day, the verdict is declared in favour of Jeevanandam and the villagers. Kathiresan, despite his efforts to thwart Chirag and the MNC, does not take part in the ensuing celebrations over the verdict and instead surrenders to the police and returns to the Kolkata prison, but not before promising Ankitha, who has now fallen in love with him, that he will marry her once he is released.