Sir Robert:  Nevertheless , that creature wo n't give up , Doctor , and we still do n't possess an actual weapon !
The Doctor: Oh , your dad got all the brains , did n't he ?
Rose Tyler: Being rude again !
The Doctor: Good , I meant that _ one _ . You want weapons ? We 're in a library ! Books ! The best weapons in the world ! This room 's the greatest arsenal we could have - arm yourselves !