Chapter 1. Introduction.- Chapter 2. British Defence Policy and the Nerve Agents in Postwar Britain, 1945–1950.-Chapter 3. A Step Too Far: The Nerve Agents and the Global Strategy Paper, 1951–1953.- Chapter 4. Drift, Decline, and a Stubborn Prime Minister, 1954–1957.- Chapter 5. Another Reverse Course: From Dependence to Acquisition, 1958–1963.- Chapter 6. A ‘Secret Deterrent’ and a ‘Campaign of Criticism’, 1964–1969.- Chapter 7. From the CS Debacle to the Rise of CW disarmament, 1970–1976.- Chapter 8. Conclusion: From Discovery to Disarmament.