Set just prior to the events of End Prog. Nibbles, Professor Welman Matrix, encounters a young girl binome who is the key to his freedom and finding his family...but first they're going to have to convince a certain young renegade sprite that there's more to Megabyte's former pet than meets the eye.

Set during the three hundred years the Eleventh Doctor spent on Trenzalore. A rare lapse in battle has enabled The Doctor to pilot his TARDIS back to Earth, his destination someone he hasn't spoken to in a long time.