The explanations, particularly in the thorny field of quantum physics, are excellent, and the selection of subject matter skilfully winnows a vast field.

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The obvious question all along has been what happens when the field winnows down to Romney, the irrepressible Ron Paul and a lone Tea Party and social conservative candidate.

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In the first-ever Apprentice-style program about art, aired over four one-hour episodes, a panel of four judges winnows a field of thousands down to a group of six, who then get put through reality-show-like challenges, including life drawing and creating a work of public art at the British seaside.

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