"It is boring, but whoever had us here, whoever is watching us and has us trapped. They try to tick us every so often. Dropping boobytrapped crates, sending things to attack, messing with the time, changing our species. Just wait, something will interest you..."

And the Doctor did wonder what the Master had instore for said 'tinkering'. It lead one to wonder far too much. He trusted him to help him, but he didn't trust what plotting he was coming up with.