The 'W' Files (衛斯理) is a 2003 Hong Kong science fantasy-action-adventure-mystery television period drama serial based on Ni Kuang's novel series Wisely Series, starring Gallen Lo as Wisely.

The series was first broadcast on TVB in Hong Kong from 2 June to 11 July 2003.

The 30-episodes long series contains a total of eight different stories, set in China in the 1930s.

In the 1930s, Wisely returns to China from his overseas studies and runs a detective agency in Shanghai to investigate paranormal events.

The series is divided into eight different stories, with Wisely and his team setting off to investigate and crack each mystery case.