CID is an Indian police procedural television series that premiered on Sony Entertainment Television on 21 January 1998. The series was created by B. P. Singh and produced by Singh and Pradeep Uppoor under the banner of Fireworks Productions in season 1; Deepak Dhar, Rajesh Chadhaa and B.P. Singh under Banijay Asia in season 2. It featured Shivaji Satam as ACP Pradyuman, Aditya Srivastava as Sr. Inspector Abhijeet, Dayanand Shetty as Sr. Inspector Daya, Dinesh Phadnis as Inspector Fredricks and Narendra Gupta as Dr. Salunkhe.

The location of CID is set in Mumbai. The series is one of the longest-running television series in India. The series first premiered on 21 January 1998 and aired its 500th episode on 18 January 2008, 1000th episode on 13 September 2013, 1500th episode on 4 March 2018, last episode on 27 October 2018. CID garnered widespread national attention and developed a substantial following due to its distinctive storytelling and unique approach. It has been described as a cult classic by Firstpost.

The series renewed for a second season, which premiered on 21 December 2024. The second season also started streaming simultaneously on Netflix from 22 February 2025.