"I was worth my weight the last time," Jack huffed. "Who was the last man standing between you and Daleks may I remind you?" he pointed out, half wanting to stick his tongue out at the Doctor. Jack was, however, over two thousand years old and far above such infantile reactions.
Which of course meant he stuck his tongue out at the Doctor. Duh.
"Yes, another TARDIS," Jack replied. "If I meant anything else, I'd have said what it was." Oh, at times, the Doctor could bring out the worst in Jack. "I walk in wherever I want to go whether I know what's behind door number one, two or three." Like running out of the Hub and jumping on the TARDIS to piggy-back somewhere. And he had yelled at Rose for making a blind leap through the Rift. God, what a hypocrite he really was. In more ways than one.
Jack was glad he was still hanging onto the Doctor. All the easier to reach up and swat at the back of his head. "Potted plants are rarely so well dressed," Jack replied in a low tone. He shook his head ever so slightly at Ianto in response to the question. No, I don't know what's going on. I'm just as lost and you know how that annoys me.
Jack cocked a thumb in the Doctor's direction. "You assume correctly. One of the signals is coming from him," Jack said. "You passed what's making one of the noises back there. The other is what I don't get." Jack paused. He supposed it was up to him to do the introductions. "Doctor, meet Ianto Jones. Ianto, the Doctor."