 River refuses the Doctor 's offer to travel with him , returning to her Stormcage prison in order to keep a promise . She kisses the Doctor goodbye , and as the Doctor has never kissed her before she deduces that this will be her last kiss with him . In the TARDIS , Amy appears unable to remember seeing her picture in the orphanage and says that she told the Doctor , rather than Rory , when she believed she was pregnant through fears that travelling in the TARDIS might have affected her child 's development . As the trio sets off , the Doctor discreetly uses the TARDIS scanner to attempt to determine if Amy is pregnant . 
