DocArchive: Assignment - The Opus Dei enigma

It's widely regarded as one of the most secretive religious organisations in the world. It makes heavy demands on its members - and has been accused of cult-like practices. It's also an influential movement within Roman Catholicism. Opus Dei, made famous by Dan Brown's bestselling novel the Da Vinci Code, has many critics - but few have found out what life is like on the inside. The BBC's religious affairs correspondent, Christopher Landau, has been granted exclusive access to the movement...