Richard has to stop his fingers wriggling.
Probability, possibility and Murphy's Law.
The duo find out more about dogs, why one dog had to go back to school.
The underwater world.
Sir John Harvey Jones advises companies on how to wrestle with problems and build on success.
Today's exploration of the speculative fever that gripped Japan in the 1980s and the subsequent crash focuses on insecurities in the workplace.
New boss Michael Hold is faced with reviving the flagging sales of a brand of deluxe caravan.
The problems that perplexed Charles Darwin.
The development of personality.