David Shepherd awakes in a cell. The middle-aged London cab driver has vague recollections of attempting to protect his female passenger from a gang of drunken youths. Patchy flash-backs of blood and screams leave him with the ominous feeling that he may have done something rather quite rash. Did he kill one of the attackers? This question is answered by the matter-of-fact Olivia, who assures him that this isn't jail and that David hasn't murdered anyone. His relief is short-lived...
