In this well written and researched volume by Mangels, we have what is essentially Guest Stars of The X-Files. In detailed episode guides, actors credits, personality profiles and exclusive interviews we learn more about the guest star faces that grace each and every episode of the show. Information here is current up to fourth season's "Gethsemane." It's surprising to see Jerry Hardin's acting credits take up a long five and a half pages! The book is profusely illustrated with the actor's b/w talent agency photographs. The highlight of this volume are the "Witness Interviews" with selected artists who passed through the show. Often, the features are with individuals who have not yet been exposed to the X-Files spotlight. Like Star Trek, X-Files has become a show in which we all want to know any new tidbit of information and this book sheds light on a "dark" corner of the X-Files mythos. Highly recommended!