Unlike some performers who failed to establish themselves beyond a single role, Keye Luke continued to work prolifically in Hollywood, at several studios. Metro-Goldwyn-Mayer cast him in a recurring role in its "Dr. Kildare" film series, and Monogram Pictures featured him in its Frankie Darro comedies and starred him as Mr. Wong in "Phantom of Chinatown". Unlike Boris Karloff, who had preceded him in the Mr. Wong role, Luke played the detective without any exotic touches. Though his Mr. Wong was of Chinese descent and able to speak Chinese, he was otherwise an ordinary American gumshoe, with no trace of a foreign accent or "Oriental" philosophy.