"He'll be here," the Doctor commented looking back and forth between the two of them. "He said he would be here," he edited slightly, but remained confident that Jack wouldn't let him down; he might have been from a different timeline, but he was still Jack.
"Well, it's good to meet you too, Doctor Owen Harper!" he nodded, "as cocky as I was about doing it on my own, I'm glad you're here. It'll help to have someone familiar with us. Familiar to Ianto, I mean. He's got no reason to trust us two," he explained, waving between himself and Romana. "He sounded pretty confused..." he trailed off, not really wanting to get into the details of the drums until he was sure that everyone who was going to turn up had turned up. It would be rather painful to have to explain it repeatedly. "Good to have someone that can spark a memory or something," he finished.