This film was a box office smash hit in India.
Because of this movie Indian actor Jaishankar earned the nickname "Thenagathu James Bond".
The song, "Palinginal Oru Maligai", was based on Artie Shaw's 'Frenesi' (1956).
The movie produced one sequel, 'CID Shankar' (1970), which was made and first released about four years later.
Some scenes were based on the first two James Bond movies, 'Dr. No' (1962) and 'From Russia with Love' (1963).