On Christmas Eve, the day of her wedding, she is accidentally pulled into the TARDIS because she has been drugged with Huon particles by her fiancé, Lance Bennett, because he was told to do so by Empress of the Racnoss. She aids the Doctor in defeating the Racnoss Empress, but says no to his invitation to travel with him — she is frightened not only by his adventures, but also by the Doctor himself. Having seen him commit genocide on the Racnoss, she urges him to find a new companion to act as his moral support. It was revealed later in "Turn Left" that the Doctor would have been killed while stopping the Racnoss if Donna was not there.