wonder man directed by h. bruce humberstone written by jack jevne , don hartman , eddie moran , melville shavelson , philip rapp based on the story by arthur sheekman plot synopsis when boisterous nightclub singer-dancer buzzy bellew ( danny kaye ) is murdered because he knew too much about certain mob activities , he decides the only way to set things right is for his ghost to inhabit the body of his timid bookish twin brother edwin dingle ( also danny kaye ) .