As a matter of fact, the Doctor did see. And other than raising his eyebrows and inwardly marveling at the Master's ability to be completely and utterly petty, he ignored it. As it was, now that they'd both had time to cool off after everything that had happened earlier, he was at a loss himself for what to do.

"Errm. Actually..." he started, awkwardly. Then he stuck his hands into his pockets, staring at a point somewhere over the Master’s head – a sure sign that a long-winded explanation was coming. "Well, this is a rare thing, but for once I have no idea. Food…? No wait, we’ve already done that, haven’t we… games, Earth television… other television.” He sucked in a breath and looked at the Master with a lop-sided grin. “Well, like you said earlier, you’re the guest.”

((Sorry to post and run, my mum's after me again... -_-))