If you haven't already, you can order UNIT: Dominion along with two special Sixth Doctor releases, the Seventh Doctor Bernice Summerfield story Love and War and the brand new Eighth Doctor box set for a total price of just £55 for the downloads and £65 for the CDs. If you just want to order UNIT: Dominion on its own, it is currently available at the special price of £30. All these offers are available until December 17th 2012. After that, the prices will be going back up to our usual rates.

As previously revealed, UNIT: Dominion features the Seventh Doctor (Sylvester McCoy), Raine Creevy (Beth Chalmers) and Elizabeth Klein (Tracey Childs). There's also a brand new Doctor, played by Alex Macqueen of The Thick of It and The Inbetweeners fame, and a guest appearance from Sophie Aldred as Ace. But what's it all about? Well...

The universe stands on the brink of a dimensional crisis – and the Doctor and Raine are pulled into the very epicentre of it.

Meanwhile, on Earth, UNIT scientific advisor Dr Elizabeth Klein and an incarnation of the Doctor she's never encountered before are tested to the limit by a series of bizarre, alien invasions.

At the heart of it all is a terrible secret, almost as old as the Time Lords themselves. Reality is beginning to unravel and two Doctors, Klein, Raine and all of UNIT must use all their strength and guile to prevent the whole of creation being torn apart.