Evil twins were also staples of serial films. They were crucial plot devices in the initial 1937 "Dick Tracy" storyline and the 1941 "Jungle Girl serial". In the 1937 serial, Gordon Tracy was introduced as Dick's twin brother. Gordon underwent an evil scientist's procedure which rendered him evil and physically transformed. For the majority of the story he and Dick were played by different actors, but it is understood that he was intended as a twin. In the case of Jungle Girl, it is not the titular character who has the twin, but her father. She is raised in the wilds of Africa, according to the narrative, because her uncle drives her father into exile there when she is a young girl. Later, after she has grown into a young woman, she stops her uncle's plan to illegally remove diamonds from the continent.