The Knocking on the Door. Word Search Puzzle Solver. The Knocking on the Door word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. The evil Dr Fu-Manchu proves to be a master of disguise as well as villainy in this thrilling episode of the popular adventure serial. Adopting the persona of a long-bearded professor Fu-Manchu pays a visit to London's Madame Tussauds waxworks. Elsewhere there's something horribly uncanny going on at a remote country cottage: sleuths Nayland Smith and Petrie leave the capital to investigate. This includes identifying and searching for words that are related to : Joan Clarkson, Humberston Wright, Fred Paul, Frank Wilson, Crime, WG Saunders, Drama, H Agar Lyons, Mystery .