Netrikkan (transl. The Third Eye) is a 1981 Indian Tamil-language drama film directed by S. P. Muthuraman and produced by Kavithalayaa Productions. The film stars Rajinikanth in a double role as father and son with Saritha and Menaka, while Goundamani, Lakshmi and Sarath Babu play supporting roles. It revolves around Chakravarthy, a middle-aged businessman who is a womaniser. In the process, he rapes a girl Radha. The rest of the film revolves around Chakravarthy's son and Radha teaching a lesson to his father to mend his ways.

The film's story and dialogues were written by Visu and the screenplay was written by K. Balachander. Babu and R. Vittal handled cinematography and editing respectively. The soundtrack and score were composed by Ilayaraja while the lyrics for the tracks were written by Kannadasan.

Netrikkan was released on 15 August 1981 and became successful at the box office. The film received critical acclaim with Rajinikanth's performance as a middle-aged womaniser being widely praised. The film was remade in Telugu as Ahankari (1992) and unofficially in Hindi as Rangeela Raja (2019).