Kavalthurai Ungal Nanban (transl. Police department is your friend) is a 2020 Indian Tamil language crime thriller film written and directed by RDM. Produced by Rajapondiyan, Bhaskaran B and Suresh Ravi under the banners of BR Talkies Corporation and White Moon Talkies. The film features Suresh Ravi and Raveena Ravi in the lead roles, with RJ Munna, Supergood Subramani and Sharath Ravi in supporting roles. This film was presented by Vetrimaaran. The film was released on 27 November 2020.
Baradwaj Rangan of Film Companion South wrote, "There's a lot of rock-solid writing by writer-director RDM. After what seems like ages, I watched a film that’s genuinely unpredictable, and not in a gimmicky way". M. Suganth rated the film 3.5 out of 5 and called it, "A harrowing account of how institutions of power abuse it". Navein Darshan of The New Indian Express said, "KUN is a reminder that content is king and presenting a hard-hitting story is still possible sans any big names. If only this effectively arresting film hadn't fallen prey to some commercial compromises and monotonous representation, it could have been so much more". Sify said, "the title Kaavalthurai Ungal Nanban might sound as if the film is yet another fictional plot to glorify the cops. But the film's director RDM has registered the vicious side of the police force with his maiden venture, which is hard-hitting"