The word "Sithleen" is enough to catch Gwen's attention; even if she's never bumped into one herself, she's come across it once or twice in the Torchwood databanks. And it's enough to make her forget about nutters and vinegar covered baggage boys.

"Why didn't you mention that in the first place?" she admonishes. "Where's he headed?" she adds as she braces to kick into a run.