In its long television run, the low-budget but beloved science fiction serial Dr. Who featured numerous bloopers that producers could not afford to reshoot. Today, spotting and discussing those bloopers has become a favorite pastime for fans seeking answers to penetrating questions: When was the First Doctor on a slight exploitation? What does the Second Doctor call the sectional supply unit? When does the Third Doctor mistake a silicate rod for a silicon rod? What is hanging from the Fourth Doctor's nose when is in a cell on Traken? How does the Fifth Doctor accomplish his disappearing hat trick? Where does the Sixth Doctor believe Peri's heart and liver are located? What does the Seventh Doctor do when Ray asks what he is doing? Why does the Eighth Doctor not know the difference between Twelve and Thirteen?

This work is the largest existing collection of errors appearing in Doctor Who, from every episode of the original television series, the movies, and the spin-offs. Presenting over 4000 errors and about 1500 other items of interest to fans, it includes transmitted bloopers such as microphones or equipment visible in a shot, obvious strings, anachronisms, unsteady sets, and actors having trouble walking. This book not only presents previously unrecorded bloopers, but also corrects errors in others lists and even refutes well-established blooper claims.

The work guides the reader through the stories of each Doctor (first to eighth). Information on each story begins with the official BBC code and title, alternate titles, writers and directors, media examined in creating this list, running times, highlights, questions to keep in mind, and then information on the individual episodes. For each episode, the work provides information on the date of first transmission and a list of errors and trivia, each with its approximate time within the episode. The book also lists errors from the untransmitted parts of the pilot episode and Shada, and concludes with "the Forgotten Doctor" and related programs such as K-9 and Company, Dimensions in Time, and The Curse of the Fatal Death.