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Melvyn Bragg ¨C In Our Time (9.00 am R4). Richard Drayton and Simon Schaffer on science and Victorian imperialism.
A Revolution in Five Acts (11.00 am R4, repeated 9.30). Ian Hislop plus historians on the Reform Act of 1867.
Moral Notes (11.30 am R4). Simon Brett continues his series with a selection of Victorian love songs.
Victorian Love Stories (3.30 R4). Henry Harland¡¯s Flower o¡¯ the Quince .
The Material World (4.30 R4). The crisis of North Sea fish stocks, with experts Colin Bannister and Mike Heath.
In Business (8.30 R4). The end of the US boom years, and what they mean.
Costing the Earth (9.00 R4). ¡°Wildlife for All¡±. What can be done to bring people and nature back together?
The 1940s House (9.00 C4). Last in series: the guinea-pig family and series advisers reflect on their attempt to re-live wartime civilian life.
? : The Mystery of the Miami Circle (9.00 BBC2; 9.30 in Wales). How archaeological discoveries in downtown Miami are leading to a reassessment of Florida¡¯s inhabitants prior to Columbus.
Music Masters ¨C John Adams (9.00 BBC Knowledge). US composer profiled.
? ¨C Brief Encounters (9.50 BBC2, 10.20 in Wales). Jupiter and its moons.
?   (10.00 C4). ¡°Post Hoc, Ego Propter Hoc¡±. Don¡¯t you love it when mainstream US drama series start quoting Latin at you?
Clive Anderson's Conspiracies (8.15, 10.30 and 12.15 am BBC Choice). Clive Anderson explores theories about the TWA 800 disaster and the Oklahoma bombing.
?  (from 12.30 am BBC2). Open University's science night includes Background Brief: Superbugs on the March (12.40 am), on antibiotic-resistant microbes.