"What would you steal from the Eleventh Doctor?" David: "I love his TARDIS, it's a wonderful piece of work." "What would you steal from the Tenth Doctor: "Rose, 'cause I love Billie, she's a good friend." "So they want to steal each other's girlfriends?
Which line is originally taken from Arthur Weasley in HP when he asks Harry "Maybe, since you were raised by muggles, you can help me. What exactly IS the function of a rubber duck?" People who quote HP ftw