At first, Des was incredibly confused by the introduction, and he frowned at her in the half-light. "Yeah... I know..." he told her slowly, and then it clicked. "Ah. Long story, but I'm sort of... unstuck in time, so I know you but you don't know me yet," he explained, as if it was entirely normal. On the station, pretty much anything was normal. "I know your brother well," he added.