5. Billie Piper as the WMD interface
Fans were wondering just how Rose Tyler would be incorporated into 50th anniversary special of Doctor Who considering her character is supposed to be stuck in another dimension with a human copy of the tenth Doctor (it's complicated). However, writer Steven Moffat neatly managed to get around this dilemma by creating a new character for Piper to play. She gave a sterling performance that was initially quite eccentric, much like Suranne Jones' turn as the Tardis in The Doctor's Wife. Piper's scenes with Hurt were magical.