Well, he mentioned he was a friend of Andrew, that ought to have helped. The TARDIS did drop James off there. But alright, they could've become friends since coming here.

"Android?" he asks, equally surprised and confused. "He didn't appear to be an android," he says, considering it. Could've been a very convincing android, perhaps. "Then again, the Rift might have changed him too." And he supposes they didn't actually meet in the physical world, so how he appeared could have been only how he envisioned himself.