...that was an unexpected reaction. Jack's eyes narrow infinitesimally, as that little detail gets added into the running tab of his reactions. Establish a baseline.

"A headache," he says, keeping his voice flat. Well. It did, after a fashion – he spent a good long time with an ocular migraine courtesy of the Rift, before it decided to switch things up on him.

And you? Empathy, or...?

Or this Ianto really does have a different history to his own. And Jack doesn't appreciate that revelation.