This reference book is a chronicle of the television series Thriller, which was hosted and introduced by Boris Karloff, and ran for two seasons from 1960-62 and was an hour in length. The book contains each of the 67 episodes in original date order, and includes complete cast listings, directorial credits, a story synopsis, and numerous photographs. The show featured Karloff introducing a mix of macabre horror tales and suspense thrillers. A bit of the story would take place, and after a few minutes Karloff would appear, giving a brief description of the story, followed by an introduction of the main actors. He concluded by saying "As sure as my name is Boris Karloff, this is a thriller!" Karloff also appeared as an actor in five episodes over the duration of the series.