A review of the sciences introduced by Christopher Chataway.

A man playing chess blindfold against eight opponents, an American worm eating its relatives, an octopus reacting to a scientist's signals in Naples... These are some of the elements in tonight's investigation of memory.

Research on the brain and its workings has recently expanded enormously, producing a record crop of scientific theories. But how near are we yet to any real knowledge of the mysterious processes by which we record, store, and recall our memories?