Saithan (transl. Demon) is a 2016 Indian Tamil-language psychological action thriller film written and directed by Pradeep Krishnamoorthy in his directoral debut. The film stars Vijay Antony in a dual role as father and son with Arundhati Nair, Charuhasan, Y. G. Mahendra, Siddhartha Shankar and Kitty amongst others forming the secondary cast. Based on the novel Aaah! by Sujatha, it revolves around a software engineer who gets into trouble after he starts hearing strange voices asking him to kill a woman named Jayalakshmi. The film was released theatrically on 1 December 2016.