Timewatch - Season 23 (1982)

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Striking suddenly, a killer wave of water struck the counties of the Bristol Channel on 30 January 1607. The flooding stretched as far as the Glastonbury Tor 14 miles inland, and inundated two hundred square miles of Somerset, Devon, Glamorganshire and Monmouthshire. 'Timewatch' follows the research of two scientists, Professor Simon Haslett from Bath Spa University and Australian geologist Ted Bryant from the University of Wollongong, who are increasingly convinced that the killer wave was not simply a freak storm but a rare British tsunami.

UK historians Tony Wilmot and Dan Garner head up a summer-long dig to discover more about the great lost Roman Amphitheatre at Chester.

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To mark the 400th anniversary of the infamous Gunpowder Plot, Timewatch attempts to establish why the conspirators had became so radicalized under the reign of James I, and assesses just how close the plotters came to achieving their aims.

Thirty years ago, Communist Cambodian leader Pol Pot set about establishing a nation of people living to serve the state. He insisted that anything private, right down to his subjects' thoughts and emotions, were immoral. When Pol Pot's plan to increase rice production failed, he declared it was due to enemies within the party. Thus began the purge of some of Pol Pot's most devoted followers and their families. Almost two million people were brutally tortured and executed in the killing fields of Cambodia, a quarter of the country's population in less than four years....

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Psychological analysis of the biggest madman of the 20th century.