Book excerpt: The heroes, villains, and monsters portrayed in such popular science fiction television series as Heroes, Lost, Battlestar Galactica, Caprica, Doctor Who, and Torchwood, as well as Joss Whedon's many series, illustrate a shift from traditional, clearly defined characterizations toward much murkier definitions. Traditional heroes give way to "gray" heroes who must become more like the villains or monsters they face if they are going to successfully save society. This book examines the ambiguous heroes and villains, focusing on these characters' different perspectives on morality and their roles within society. Appendices include production details for each series, descriptions and summaries of pivotal episodes, and a list of selected texts for classroom use. Instructors considering this book for use in a course may request an examination copy here.