His Tamil film, "Thambi" (2006) directed by Seeman, had a delayed release but became a profitable venture in town and village centres. Madhavan's portrayal of a rustic do-gooder, received positive reviews from critics though a reviewer from The Hindu claimed the actor was "unable to shed off his classy looks". He then appeared in Sundar C's comedy film "Rendu" (2006), where he played dual roles for the first time and in the long-delayed romantic comedy "Aarya" (2007), appearing as a medical student. Madhavan wrote the dialogues, produced and featured in the lead role in Nishikanth Kamat's "Evano Oruvan" (2007), playing a middle class bank employee who becomes so disgusted with the corruption he faces in his day-to-day life that he becomes a vigilante. After setting up a production studio, Leukos Films, he helped promote the film in international film festivals before the theatrical release in December 2007. Critics called the film a "must watch" and a reviewer from The Hindu stated that the film was "Madhavan's best performance to date", while he also went on to win the ITFA Best Actor Award for his depiction. However "Evano Oruvan" and his subsequent release, Seeman's "Vaazhthukal" (2008) did not perform well at the box office, while another completed film titled "Naan Aval Adhu" failed to have a theatrical release. Madhavan's final release of the year was the docudrama "Mumbai Meri Jaan", based upon the 2006 Mumbai Bombings. The film, which featured him alongside Soha Ali Khan, Irrfan Khan and Kay Kay Menon became critically acclaimed with Madhavan's portrayal of a man with a post-traumatic stress disorder being appreciated by reviewers.