Dr Hairy's outburst on the subject of the Big.Data initiative continues to make waves. The Undersecretary has an unexpected visit from the mysterious and sinister Number One, and Dr Hairy has an equally unexpected visit from the vengeful Dr Stead - with hilarious results! The fourth part of four.  The latest in a series of low-tech zero-budget puppet-animation videos about the adventures and misadventures of an ordinary (but somewhat hirsute) doctor working in the NHS.  On YouTube: http://youtu.be/UQJWWoH9J78 On Vimeo: https://vimeo.com/110717910 More about Dr Hairy: http://drhairy.org  - Edward Picot http://edwardpicot.com - personal website