|Produced by||G. P. Vijayakumar|
|Edited by||N. Gopalakrishnan|
Seven Arts Films
|Distributed by||Seven Arts Release|
Thalavattam is a 1986 Indian Malayalam-language drama film written and directed by Priyadarshan, starring Mohanlal, M. G. Soman and Karthika. The movie is based on the 1975 movie One Flew Over The Cuckoo's Nest  which was an adaptation of the 1962 novel of the same name by Ken Kesey. The film features songs composed by Raghu Kumar and C. Rajamani, and a score by Johnson. The story follows Vinod, an eccentric new patient at a mental asylum.The film has grossed around 10 crore.
Vinod (Mohanlal) becomes mentally ill after his girlfriend Anitha (Lizy) dies because of an electric short circuit accident during a rock concert. Vinod is admitted into mental hospital managed by Dr. Ravindran (M. G. Soman), in Ooty. Dr Ravindran is aggressive and mean who has a dislike for Vinod.
With the help of Dr. Savithri (Karthika), who is Dr. Ravindran's daughter, and Dr. Unnikrishnan (Nedumudi Venu), a very old and close acquaintance of Vinod from his childhood, he slowly regains his memory and mental equilibrium. Savithri and Vinod fall in love. Dr. Ravindran has already arranged Savithri's marriage with Hari (Mukesh), so he opposes the lovers.
When he finds that Savithri and Vinod are adamant, Dr. Ravindran lobotomises Vinod and puts him in a state of coma. Dr. Unnikrishnan feels that death would be preferable over a vegetative life and kills Vinod. He confronts Dr. Ravindran and confesses to the euthanasia. Savithri overhears the conversation, and loses her mental equilibrium. She is admitted into the same institution as a patient.
- Mohanlal as Vinod Kumar ('Vinu') a mental patient and protagonist of film
- Mukesh as Hari ('Chukkan'), Savithri's cousin
- Nedumudi Venu as Dr. Unnikrishnan ('Unniettan')
- M. G. Soman as Dr. Ravindran Varma, a cruel and aggressive man who has a hatred against Vinod
- Karthika as Savithri, Dr. Ravindran's daughter, and Vinod's new love partner.
- Lizy as Anitha, Vinod's Girlfriend
- Jagathi Sreekumar as Narayanan
- Cochin Haneefa as Antony, an Aggressive Hospital Attendant
- Sukumari as Nurse Rachel
- G. P. Vijayakumar as Satheesh, Vinod's brother
- K. P. A. C. Sunny as Retd. Judge Melepattil Govindan Kumar, Vinod's father
- KPAC Lalitha as Subhadra kunjamma, a Mental Patient
- Thikkurissy Sukumaran Nair as 'Appoopan', a Mental Patient
- Maniyanpilla Raju as Joseph, a Mental Patient
- Sankaradi as Thirumeni, a Mental Patient
|1.||"Kalabham Chaarthum"||M. G. Sreekumar|
|2.||"Konchum Nin Imbam"||Pandalam Sudhakaran||K. J. Yesudas, K. S. Chithra|
|3.||"Koottil Ninnum"||K. J. Yesudas|
|4.||"Pon Veene"||K. S. Chithra|
|5.||"Pon Veene"||K. S. Chithra, M. G. Sreekumar|
Thalavattam was released in Kerala in 12 centres on 10 locations. The film performed well at the box office, becoming the highest-grossing Malayalam films of the year. It was made on a budget of ₹20 lakh. The film ran over 150 days in theatres. Thalavattam was remade in Hindi as Kyon Ki in 2005. The film was also remade in Tamil in 1988 by Robert-Rajasekhar as Manasukkul Mathappu, with Prabhu and Saranya playing the lead.
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