Interference – Book One: Shock Tactic is an original novel written by Lawrence Miles and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor, the Third Doctor, Sam, Fitz, Sarah Jane, and K-9. The book also marks Sam's departure, and the introduction of a new companion, Compassion. See also Interference – Book Two Faction Paradox External links The Cloister Library - Interference: Book One 1999 British novels 1999 science fiction novels Eighth Doctor Adventures Third Doctor novels Novels by Lawrence Miles Doctor Who multi-Doctor stories BBC Books books Faction Paradox