A governmental think-tank, whose remit is to curb the independence of the intelligence service, has lost one of its key members, and Claude Whelan - one-time head of MI5's Regent's Park - is tasked with tracking her down. But the trail leads straight back to the Park itself, with Diana Taverner as chief suspect. Has Diana overplayed her hand at last? What's her counterpart doing in London? And does Jackson Lamb know more than he's telling? Over at...