CID Shankar is a 1970 Indian Tamil-language spy thriller film, directed by R. Sundaram, produced by Modern Theatres and written by A. L. Narayanan. Music was by Vedha. It stars Jaishankar, A. Sakunthala, and Thengai Srinivasan. V. S. Raghavan, R. S. Manohar, C. L. Anandan, Jayakumari, B. V. Radha and M. Bhanumathi play supporting roles. The film was a remake of the 1965 French/Italian co-production Eurospy film OSS 117 Mission for a Killer. It was released on 1 May 1970, and became an average success. Sakunthala became known as "CID Sakunthala" after the film's release.

Thengai Srinivasan was an Indian actor who appeared in Tamil-language films and plays from the 1960s to the 1980s. He was given the prefix Thengai (coconut) after his role as a coconut-seller in the play Kal Manam. Although originally a comedian, he also performed in other genres and enacted several lead and antagonistic roles.