"Well, there<em>was</em>this guy once," Robin said sarcastically, "He had an archenemy and let them steal lots of Vikings for completely unknown purposes." She winced as the Doctor helped her upright, knowing there would be more bruises where her others had just faded. Such was life with the Doctor, she supposed. And she smiled, because she knew that she could handle a couple bruises if it meant traveling with this man.<br/><br/>When the Doctor was stunned into silence, Robin slowly joined him at the door. Her breath was also stolen as she stared up at the view, unable to imagine how high the tree extended into the sky. It seemed an impossibility, for something natural to get that huge. A Gaia tree... She wondered what that meant. As the Doctor spoke, she directed her gaze to the buildings in its roots, and the ships traveling toward them.<br/><br/>"What's a Gaia tree?" she asked, awestruck by the gigantic thing. "And who's that flying to those buildings? Are they Dalek ships?"