Ianto, quite reasonably, didn't even begin to process the sentence until he heard his name, at which point he looked over with a slight frown--and as for the words, he worked backward.

"No," he said, and then, with a quirk of an eyebrow, "Doctor?" He's a smart lad, Ianto.

Then, a second later, as he remembered something, turning very slightly toward the vehicle in consideration. "Maybe."