A psycologist arrives to conduct a study of older men in the workplace and asks the team for help on a personal matter, Years earlier, her berother, a bicycle messenger, was the victim of a hit and run that left him with severe memory loss. Now he claims he was a target--and still is.

In 2004, a prominent physics professor disappeared from a train bound for Paaris. When his wife receives emails from someone claiming to know the reason, the team reopens the case. Then their boss, DAS Strickland, is warned off by a shadowy Whitehall figure.