Check out the first clip from the Doctor Who Christmas special, "Time of the Doctor." In which the Doctor finally faces a problem too big for the sonic screwdriver.

It's just a short snippet, but it showcases one of the main features of this special: We're rebooting Clara's home life, getting rid of the "nanny to two kids" setup and replacing it with an actual family, for whom she's cooking Christmas dinner. And now I'm hungry...