Michael Rosen investigates coded language.
Kirsty Young's castaway is Sir Stuart Rose, executive chairman of Marks and Spencer...
Cathy O'Dowd on the choice she had to make when she saw a dying climber on Everest.
Russell Davies chairs the seventh heat of the perennial general knowledge contest.
Andrew Marr with Tariq Ramadan, Sir Mark Walport, Kate Bush and Jonathan Phillips.