[3] The suspense-filled narration of the movies and the novelty of the investigative thriller genre also contributed to its success and becoming a household name among the moviegoers of Kerala.

The character was inspired by a police officer named Radhavinod Raju, who in 2009 was appointed as the first chief of India's National Investigation Agency.

[4][5] The character is said to have been inspired by the police officer Radhavinod Raju, who in 2009 was appointed as the first chief of India's National Investigation Agency.

[9][7] Radhavinod Raju was also associated with the probes into Rajiv Gandhi assassination case and hijacking of Indian Airlines plane to Kandahar.

[14] His entries and exits in most scenes of the movies are punctuated by the signature background score of the series, composed by Shyam.