Unnodu Oru Naal () is a 2013 Indian Tamil-language romantic thriller film directed by Durai Karthikeyan and starring Arjun Vijayraghavan, Gibran and Neelam. The film is inspired by the American film Across the Hall (2009). The Tamil film Ner Ethir (2014) has a similar storyline.
The film is about two friends who fall in love with the same girl.
Madhav falls in love with Priya, but Priya leaves Madhav and falls in love with Karthik. Madhav tries to forget Priya and leaves the country. Karthik marries Priya but later reveals a different side of himself. What happens next forms the rest of the story.
Director Durai Karthikeyan died during the film's production, and his assistant Shakthi took over the direction.
The music is composed by Sivaprakasam. Lyrics by G. Malathi and Rudra. The music launch was attended by A. R. Reihana and Shantha Kumar.
M. Suganth of The Times of India opined that "With a weak script and limp performances, Durai KarthikeyanâÂÂs debut film mostly resembles a student film that has managed to get screened on the big screen". On the contrary, Malini Mannath of The New Indian Express wrote that "Unnodu... is ideal fare for lovers of this genre".