The Island of the Lost (German: Die Insel der Verschollenen) is a 1921 German silent science fiction film directed by Urban Gad and starring Alf Blütecher, Hanni Weisse and Erich Kaiser-Titz. It is a loose unauthorized adaptation of the 1896 novel The Island of Doctor Moreau by H. G. Wells. Author Wells was allegedly unaware that this unauthorized version of his novel existed. It was a common practice in the silent era for European filmmakers to produce unauthorized versions of famous works of literature, as evidenced by F. W. Murnau's Der Januskopf(1920) (based upon Robert Louis Stevenson's Dr. Jekyll and Mr. Hyde) and Nosferatu (1922) (based upon Bram Stoker's Dracula).

Plot

Dr. Marston leads a small party to a deserted island in the South Seas where they discover a hidden research facility run by a Professor McClelland. The scientist is experimenting with mixing the DNA of animals and humans, with frightening results.