The Stalker's Apprentice.

When an absorbing new manuscript finds its way across his desk, Marcus Walwyn (Gideon Turner), an impressionable young publisher, befriends the book's author (Peter Davison) and suddenly has trouble leaving his work at the office. Intrigued by the volume's step-by-step instructions on how to stalk and murder an unsuspecting victim, Marcus grows obsessed with becoming an expert. This made-for-television drama is based on the book by M.S. Power.