Robin looked around warily, feeling as though some new, terrifying threat would jump out at any moment. The square remained silent... Which was somehow much more ominous. When the Doctor mentioned a viral outbreak, she grew a little afraid, hoping that if that was the case, she and the Doctor weren't in danger. When she realized that he was no longer talking, she looked around. With a sigh, she took off after her friend.<br/><br/>He mentioned UNIT, which reminded her of their friends in the Gaia tree. Her eyes narrowed as the Doctor spoke. Something was terribly wrong here... And a new, even scarier thought entered her head.<br/><br/>"Doctor..." Her voice was frightened, and she placed a hand on his arm. "What if it isn't just London? What if the whole world is empty?"