Detective Lloyd (1931) is a 12-chapter Universal movie serial. A co-production between the American company Universal and the British company General Films, it was filmed entirely in Britain with British and Commonwealth actors. It was the only sound serial ever produced in the UK. Although a print was shown on British and Swedish TV as recently as the 1970s, the film is now considered lost.

It was also known by the titles Lloyd of the C.I.D. and In the Hands of the Hinfu. Detective Lloyd battled a villain known as the Panther in this serial. Material from the serial was edited into a feature film version called The Green Spot Mystery (1932), which is also a lost film. Detective Lloyd is on the British Film Institute's BFI 75 Most Wanted list of lost films.