Donna laughs with him , and buried in that weak , wheezy chuckle is the delighted laugh of a thirty - something temp who is seeing the world anew . `` I rather thought , '' the Doctor says once they 've stopped laughing , `` that ... well ... that you might fancy just one more trip . '' Donna 's breath catches .
Her heart begins to race ; she can hear it pounding frantically .
Emotion: Surprise