Why you can trust GamesRadar+ Our experts review games, movies and tech over countless hours, so you can choose the best for you. Find out more about our reviews policy.
Written by: Steven Moffat
Directed by: Euros Lyn
Article continues below 
THE ONE WHERE
The Doctor, Donna and a group of 51st century archaeologists arrive at a giant library where everything’s been a little too quiet for the last 100 years. There’s something nasty lurking in the shadows, and it’s somehow connected with a little girl having nightmares on what appears to be 21st century Earth.
VERDICT
After giving an entire generation of kids a phobia of statues with last-year’s Hugo-nominated “Blink”, Who showrunner elect Steven Moffat has now guaranteed they’ll also be sleeping with the lights on. The “count the shadows” theme has the same elegant simplicity as “Blink”’s “don’t look away”, and Moffat once again shows he’s a master at mining maximum chill power from an unseen enemy.
The Vashta Nerada may be faceless “piranhas of the air” (aside from when they possess a spacesuit-clad skeleton), but no monster created courtesy of special effects could ever be as creepy as those which Moffat implants in your mind. To say they live in shadows all over the galaxy, even on Earth, might seem a little cruel to this planet’s more impressionable kids, but isn’t that what Doctor Who’s supposed to be about?
The intriguing parallel plotline about the nameless little girl telling her psychiatrist Dr Moon (Colin Salmon) about the library in her head - or perhaps, as is hinted in the closing scenes, her world is fiction and the library reality - only serves to emphasise the episode’s claims to being the best of the series so far.
A RIVER RUNS THROUGH IT
Professor River Song (former ER star Alex Kingston) called the Doctor to the Library via psychic paper, carries a sonic screwdriver exactly like his, and has a diary of her previous meetings with the Time Lord - trips to Asgard and Byzantium that are still in his future. Who is she, and is there more to her than initially meets the eye? We’re guessing, yes…
SPECULATION
The fact that River remembers the Tenth Doctor as an older man suggests there’s plenty of time left for his current incarnation.
BRAVE NEW WORLD
Simply known as “The Library”, the planet-sized book depository contains every tome ever published. The whole continent of Jeffrey Archer described by the Doctor is a very frightening prospect…
HIGHLIGHT
Having been reduced to a skeleton by those nasty Vashta Nerada, Miss Evangelista (Tallulah Riley) briefly lives on as a “Data Ghost” in her communicator before fading away to nothing. Chilling, heartbreaking (this is one Who death we’re forced to watch in full) and most importantly, a magnificent plot device.
IN LEAGUE
First Mark Gatiss appears in “The Lazarus Experiment”, now fellow League of Gentlemen star Steve Pemberton turns up as expedition benefactor Strackman Lux. Reece Shearsmith’s agent should give the Who production team a call…
INSPIRATION
The “stay out of the dark” plot device is rather reminiscent of Pitch Black.
BEST LINE
Donna: “Isn’t travelling with you one big spoiler?”
The Doctor: "I try to keep you away from major plot developments. Which to be honest I seem to be very bad at."
Richard Edwards
