The history behind the week's headlines, with Mark Urban.
Niall Dickson reveals that even from its outset 50 years ago the National Health Service was at the centre of fierce Cabinet battles between those who wanted a free service and the Treasury, who insisted on charges, and he examines the severe financial difficulties the NHS faced within its first year.
Novelist and former MP Edwina Currie sizes up the impact of the drug Viagra. designed to help people with impotence, and looks at society's attempted solutions to the problem down the ages.
Renaissance scholar Lisa Jardine explains how the invention of printing 500 years ago caused an explosion of information. She argues that it led to the Reformation and speculates on what the internet might herald.
Editors Archie Baron and Neil Cameron