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Martha Kearney looks at the arguments over creating the NHS in wartime government papers.

Martha Kearney looks at secret government papers from 1992.

Newly declassified documents tell the stories of Britons persecuted by Nazi Germany.

Martha Kearney reviews the release of secret government files from 1986.

Martha Kearney reviews the release of secret government files from the mid 1980s.

Martha Kearney reveals the secrets within the prime minister's newly-opened files of 1984.

Martha Kearney reveals the secrets in the cabinet and prime minister papers of 1983.

Martha Kearney looks at the events of 1982 through newly-released government papers.

Martha Kearney's guests review secret government papers from 1981.

Martha Kearney and guests revisit 1980 through previously classified government documents.

Martha Kearney and guests revisit 1979 through previously classified government documents.

Martha Kearney and guests revisit 1978 through previously classified government documents.

Martha Kearney and guests revisit 1977 through previously classified government documents.

Martha Kearney and guests revisit 1976 through previously classified government documents.

Martha Kearney and guests revisit 1975 through previously classified government documents.

Sue MacGregor and guests revisit 1974 through previously classified government documents.