Blue Mountain Express) is a 1968 Indian Tamil-language thriller film directed by Thirumalai–Mahalingam and written by Cho Ramaswamy.

[2] A murder takes place aboard Neelagiri Express, bound to Coimbatore from Madras.

CID Inspector Shankar is assigned the task of nabbing the murderer.

So, he sets out of solving the case with the help of Ravanan and eventually tracks down the murderer.

[citation needed] Neelagiri Express was released on 23 March 1968.