Films directed by N. K. Viswanathan

Sankarlal is a 1981 Indian Tamil-language action film, written, directed and produced by T. N. Balu. It stars Kamal Haasan in dual lead roles as father and son. Balu died half-way during production, and the film was eventually completed with N. K. Viswanathan as director. The film was simultaneously shot in Telugu-language as Andagaadu () with Allu Rama Lingaiah and Rao Gopal Rao.