Who's Guilty? is a 1945 American film serial. It was the 28th of 57 serials released by Columbia Pictures. Who's Guilty? was a rare attempt at a whodunit mystery film in serial form. The serial's villain was designed to look like The Shadow on the poster. The film co-starred some well-known actors, such as Charles Middleton, Wheeler Oakman and Minerva Urecal. Robert Kent played the lead role of Detective Bob Stewart.