"Eliot's gonna be a big brother," Sky announced as she let Clyde into the house.

"Who's Eliot?"

"Kid in my class. He wants a little brother—can we tell the Shopkeeper to bring him one? Or is there a factory somewhere making babies?"

"What?"

"That's how Mum got me and Luke?"

Clyde covered his mother. "Well, yes, but that's not…er …that's not how it normally works. Most people don't chat with aliens—and babies don't normally show up on doorsteps."

"I did."

"Not me."

"Where did you come from, then?"

Clyde blushed. "No, don't ask me. That's Sarah Jane's job."