"Actually, we came first. Humans just look like us. More or less. There are some differences, but they're not immediately apparent." The Doctor rubbed the back of his neck and smiled at Billy as he ran his hand up through his hair. "Oi! Cheeky. I'll have you know that I'm considered a genius and where I come from we built spacecraft for show and tell. I drew lightning bolts on mine."

He used a finger to draw a bolt in the air now and then he smiled, just a bit wistful as he blinked and looked off to the side. "Oh, yeah. It's brilliant."