Harvard Business School alumni in all BBC programmes
Ashraf Ghani, president of Afghanistan, the anthropologist with the explosive temper.
Profile looks at US Treasury Secretary Henry Paulson.
Chris Bowlby profiles Jeremy Heywood who is to become the new Cabinet Secretary.
Allan Little profiles Republican Presidential Candidate Mitt Romney.
Edward Stourton profiles Rona Fairhead, the woman nominated to chair the BBC Trust.
Mark Coles profiles Sir Martin Sorrell, the Don Draper of the 21st century.
Journalist Peter Oborne profiles the financier Sir Ronald Cohen.
Stephen Bannon, chief strategist and senior counsellor for president-elect Donald Trump.