Thatrom Thookrom (transl. Knock and Rock) is a 2020 Indian Tamil-language action drama film written and directed by Arul S. The film stars Teejay Arunasalam, Cheenu Mohan and Kaali Venkat while Sampath Ram portrays a negative role. Balamurali Balu composed music for the film while Kabilan Vairamuthu penned lyrics for the songs. The film had a low profile theatrical release on 14 November 2020.
The principal photography of the film began during early 2018 with Teejay Arunasalam being signed to play the lead role in 2017. Most of the portions of the film were shot and set in Chennai. The film was initially speculated to be based on the 2016 Indian banknote demonetisation, however, the director revealed that the film will not be analysing the concept.
The music rights for the film are owned by Balamurali Balu. The first single “Demonetisation anthem” was released during November 2017 and became viral despite controversies. The song was inspired from the demonetisation which was imposed by Indian Prime minister Narendra Modi on 8 November 2016.