"Doctor?" Donna walks into the main console room.
"Under here!" the Doctor grunts from where he is lying under the main console fiddling with the wires there.
"I've got a question."
"Go ahead and ask," the Doctor says, still doing his work with the TARDIS. A sharp pain his ankle makes him yelp as Donna kicks him there.
"Oi, spaceman! I don't know how you talked to your other companions, but when I'm talking I want you to be listening."
"I was listening!" he defends himself but slides out from under the controls anyways. "What'd you want?"
"Well," Donna looks away for moment. "I was just wondering, well—"
"Yes?" the Doctor says.
"Let me finish, you dumbo!" she gives him a glare. "I was just wondering why you brought me along."
"Well, technically you asked," the Doctor grins.
"I'm serious."
"That's new," the Doctor murmurs still smiling.
"Oi!"
"Sorry."
"So?" Donna tries again. "Why'd you bring me?"
"Cos you're my friend," the Doctor nods. "And you're special."
"No I'm not," Donna laughs a bit with an eye roll. "You're the special one. An alien. And what do you call yourself? Time boy?"
"Time Lord."
"Whatever. But you can control time!" Donna frowns a bit. "And travel in space. Bend them both to your will! You're basically a god. And I'm just a small, ordinary human."
"There's no such thing as an ordinary human," the Doctor says.
"Yeah, right."
"Donna," the Doctor puts his hands on her shoulders. "No one's ever ordinary. Everyone's special. Especially you! Like, how many people can help save the world in a wedding dress? Or go investigate about living fat? And how many people have met Agatha Christie?"
"Anyone can do that if they travel with you," Donna says.
"But you're not anyone," the Doctor smiles. "I don't ask just anyone to travel with me. I asked you to travel with me. You're the best mate I could ever have! Smart, brilliant at times, sassy, bossy, strong, a little loud—"
"Oi, watch it," Donna smiles. "Or I'm gonna smack you."
"And not everyone gets to smack a Lord of Time," the Doctor grins goofily.
"That's true," Donna smirks, and then gives him a slap to the arm.
"Hey!" he yelps and rubs his appendage. "I didn't say you had to!"
"Well, it proves that I'm not everyone then," Donna smiles. "Now when are you going to that hat planet you promised?"