Sayahnam (English: Twilight) is a 2000 Malayalam feature film that marks the directorial debut of R. Sarath, who also wrote the screenplay. The film is a drama centred on the environmental and anti-nuclear issue in India. It stars O. Madhavan, Gomathi Mahadevan, Ebrahim Kutty and Alex Kadavil. It won seven Kerala State Film Awards and two National Film Awards.^[1]

An old man, who is a writer, is proud of his son who is a scientist, but upset about the country's involvement in nuclear tests. He finds himself increasingly isolated as his own son celebrates the nuclear advances made in India

• O. Madhavan as Sakhav KK
• Gomathi Mahadevan as Bharathi, wife of Sakhav
• P. I. Ibrahim Kutty as Siddharthan, Sakhav's elder son
• Shari as Salini, Siddharthan's wife
• Jomol as Volga
• Alex kadavil as Ramachandran
• Remya Nambeesan as Amala, daughter of Siddharthan and Salini

National Film Awards^[2]

• Indira Gandhi Award for Best Debut Film of a Director - R. Sarath (film director) and M. S. Nazeer (film producer)

Kerala State Film Awards^[3]

• Best Film - Sayahnam
• Best Actor - O. Madhavan
• Best Story - R. Sarath
• Best Dubbing Artist - Gopalakrishnan
• Best Male Singer - Vidhu Prathap
• Best Editing - Beena Paul
• Best Art Direction - A. V. Gokuldas

• Sayahnam at the British Film Institute Movie Database
• Sayahnam at the Malayalam Movie Database