Out of Time

After the Doctor is alerted to time distortion and high levels of entropy, the Time Lord’s investigation lead’s him to the planet Verdopolis, where after countless time experiments to halt the progression of time, time is literally running out for the rest of the Universe. The whole of reality is threatened and it’s up to the Doctor to save everyone but he’s going to need a little help from some old friends.
And one of those friends just so happens to be Anna Bailey who after three years is still struggling to adjust to life after the Doctor, haunted by her stalled life, unable to understand her destiny and why the mystery man who Anna is supposed to continue her family line with hasn’t materialised into her world yet. Though there’s one man about to drop back into Anna’s world as an exhilarating and scary adventure awaits the Doctor and his former companion who are joyfully and triumphantly reunited to save the Universe from a premature end.
The eighth in an eight part story arc featuring Matt Smith's Doctor.

“Alfred…I don’t like to rush you old chap but I came here very much hoping for some advice…A little brain storming session and the sharing of knowledge perhaps.” The Doctor stood up, a bundle of nervous energy though mainly because the sentient couch had become frisky and was undulating beneath him. “Time’s running out, literally running out, the whole Universe will soon be caught up in this time acceleration which has originated from Verdopolis. If we don’t do something soon, the Universe will have descended into a state of irretrievable chaos, you’re talking expansion, heat death, all the stars going out…The Universe ending billions of years before it’s time.”