Who Killed Captain Alex? is a 2010 Ugandan action comedy film written, produced, and directed by Isaac Geoffrey Godfrey Nabwana (also known as Nabwana IGG), by Wakaliwood, an ultra low-budget studio in Kampala, Uganda. The film gained viral notoriety for being a no-budget action film, produced on a reported budget of under $200 although producer Alan Hofmanis later stated that the production value was in fact $85. A trailer for the film was uploaded to YouTube in January 2010 and the full film was uploaded in March 2015, and has been viewed over 9.8 million times as of 18 October 2024. The original version of the film was lost due to power outages and "strained conditions" according to Nabwana, while the surviving version of Who Killed Captain Alex? released online includes commentary from the first English-speaking "Video Joker" that includes running gags about the characters.

The film tells the story of a civil unrest which erupts after the assassination of a beloved Ugandan soldier and Kung Fu expert, the eponymous Captain Alex. Who Killed Captain Alex? was generally well received by critics and audiences alike, who saw it as an endearing "so bad it's good" experience, despite its technical limitations.