Doctor Who: The Tenth Doctor: Spiral Staircase Part 2

Just one issue away from this year's season finale, and things have never looked more dangerous for the Doctor and Gabby! Separated by an ancient force from the centre of the galaxy, the Doctor takes a cosmic trip into the history of the universe, while Gabby must negotiate with an unearthly intelligence for the sake of the planet! How much has she learned from her brief travels with the Doctor... and will it be enough to save her?!