Ianto has lured the Doctor from the hub with his demonic, tea-making wiles. They'd have been back hours ago if they hadn't been distracted by a random alien invasion and had to stop to find an antidote for the sex-pollen.

Jack: Shiver of anticipation, probably.
Doctor: (narrows eyes)
Jack: (grins unrepentantly)

*laughs* Oh, that is so them!