Following the tragic deaths of two of their colleagues, the remaining three – Captain Jack Harkness, Gwen Cooper and Ianto Jones – have to protect the human race against an unknown force from the darkness.

Martha Jones, ex-time traveller and now working as a doctor for U.N.I.T., has been called to CERN – the world's largest particle physics laboratory in Geneva – where they're about to activate the Large Hadron Collider.

The LHC is a particle accelerator which has been built deep underground in a 27km tunnel under Switzerland and France. Once activated, the collider will fire beams of protons together, re-creating conditions a billionth of a second after the Big Bang – and potentially allowing the human race a greater insight into what the universe is made of.

But so much could go wrong – it could open a gateway to a parallel dimension, or create a black hole – and now voices from the past are calling out to people and scientists have started to disappear...

Where have the missing scientists gone? What is the secret of the glowing man? What is lurking in the underground tunnel? And do the dead ever really stay dead?

The CD is basically a clean copy of the episode most fans recorded in some form or another, on cassette, CD Rom, or DVD from Freeview Digital Radio Four on the day. For £5.99 from Amazon it was worth paying for the nice version in a jewel case with a pretty picture of the team plus Martha. It will look nice on my shelf.

7/10

Extras.

Torchwood All Access is a radio interview with Russell T. Davies, Gareth David Lloyd, Eve Myles, Kai Owen and Edward Thomas broadcast before the start of series Two on TV. It is presented by Julian Carey of BBC Wales. There isn’t much in it that fans didn’t already know, apart from the lovely image of Gareth and John Barrowman doing a Meatloaf/Cher tribute with John as Cher which was suggested in Gareth’s interview.

8/10

Buy it for nostalgia value and for the pretty inlay card picture.

8 out of 10