Book excerpt: The story of Doctor Who is the story of British television in the final third of the 20th century. It is also the story of the hopes and fears of generations of children - and grownups too - from the counterculture 60s to the shallow waters of the 90s. Along the way there are shock revelations, cliffhangers and liberal doses of humour; but also heartache, disappointment and death. Every taste is catered for in the world of Who. Each Doctor's era is put under the microscope with facts and informed opinion - and an in-depth reference section detailing further reading.