Detective Investigation Files is a 1995 Hong Kong crime investigation drama series produced by Poon Ka Tak for TVB and is the first installment in the Detective Investigation Files Series. The main characters were played by Michael Tao, Joey Leung, Kenix Kwok and Louisa So. This installment featured five different cases. In 2022, the drama was selected as one of ten classic TVB dramas being honoured for Youku and TVB's new programme.