He was about to ask her what she meant by that when an alarm started blaring. "That's an alert," he told her, pulling his glasses back off himself. "Level five! Indicating a temporal collision!" he hurried around the console. "It's like two TARDISes have merged but there's definitely only one TARDIS present." He works the console again. "It's like two time zones are moored in the heart of the TARDIS." He looks away. "That's a paradox. Could blow a hole in the space time continuum the size of..." he paused before heading to the screen. "Well," he decided with embarrassment. He looked at Rose. "The exact size of Luxembourg, actually. Bit undramatic. Luxembourg?"