Pick of the Day: Radio

NICARAGUA IS the focus of Crossing Continents (11am R4). Isabel Hilton asks why a country that embraced socialism has such a high level of domestic violence.

At the Beeb (9.30pm R2) celebrates the career of Ronnie Barker (right) with a collage of clips, from unfunny sketches with Ronnie Corbett to nostalgia- inducing snatches of Porridge and Open All Hours.

The military historian John Keegan's look at the changing face of heroism, The Mask of Command, excerpted in The Late Book (12.30am R4) builds towards an assessment of leadership in the nuclear age. The false heroics of Adolf Hitler, the self-titled "First Soldier of the Reich" and botcher of Stalingrad, are put under the microscope.