Panchanathan Arunachalam was an Indian writer, director, producer and lyricist who worked in the Tamil cinema. He was mentored by poet Kannadasan who was his uncle. He also worked as a lyricist in the Tamil cinema industry. He started producing films under his production banner named P. A. Arts. His son Subbu Panchu Arunachalam is an actor and dubbing artist in the Tamil film industry.

Guru Sishyan is a 1988 Indian Tamil-language action comedy film directed by S. P. Muthuraman. A remake of the Hindi film Insaf Ki Pukar (1987), it stars Rajinikanth, Prabhu, Seetha and Gautami with Pandiyan, Cho Ramaswamy, Ravichandran, Radha Ravi, Senthamarai, Vinu Chakravarthy and Manorama in supporting roles. The film is about two ex-convicts who set out to prove the innocence of their wrongfully imprisoned fellow convict.