RADIO CHOICE

A KILLER shade of green came into fashion in the 19th century, bringing death to many. Arsenic was used in dyes and paint, then used for fabrics, wallpapers, candles, toys and all kinds of household objects. The week-long series of readings from Kassia St Clair’s THE SECRET LIVES OF COLOUR (RADIO 4, 9.45AM (FM), 12.30AM) continues with dark tales of industrial arsenic poisoning.

A GIRL hurls herself into a winter sea off the Welsh coast. A strange man grabs her and pulls her to shore. The girl claims she was just going for a swim. As THE COMING TIDE (RADIO 4, 2.15PM) unfolds, we learn that the man has no money, has missed appointments with his probation officer, has a history of violence and has attracted the attention of local police. This murky drama attempts to make

the dubious rescuer a sympathetic figure who brings hope into the girl’s life.

IN 1996, the chess grandmaster Garry Kasparov (pictured) played a computer known as Deep Blue. Kasparov won. The next year, in a game that was to change our attitudes to artificial intelligence, Deep Blue won. On tonight’s

FREE THINKING (RADIO 3, 10PM),

Kasparov discusses our interaction with artificial intelligence, and tells Philip Dodd that humans have much to gain by accepting the fact that working with artificial intelligence could free our minds.