The Bells of Saint John (TV story)

 was the sixth episode of the seventh series of Doctor Who produced by BBC Wales. It introduced a new companion to the show, although she had, in different forms, previously appeared in both TV: Asylum of the Daleks and The Snowmen. It also reintroduced the Great Intelligence, who had last appeared in TV: The Snowmen.

Synopsis
London, 2013. "Danger. This is a warning. A warning to the whole world. You're looking for Wi-Fi. Sometimes you see something, a bit like this. Don't click it. Do not click it. Once you've clicked it, they're in your computer. They can see you. If they can see you, they might choose you. And if they do... you die."

When Clara Oswald has problems with her Internet, she's given a telephone number: the number of "the best." When the Eleventh Doctor answers at the other end, Clara is pulled into a life of adventure and mystery. But danger is lurking in the signals, picking off minds and imprisoning them. "It's like immortality, only fatal." But can the Doctor save Clara before... "I don't know where I am."

Plot
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Cast

 * The Doctor - Matt Smith
 * Clara Oswald - Jenna-Louise Coleman
 * Miss Kizlet – Celia Imrie
 * Mahler – Robert Whitlock
 * Alexei - Dan Li
 * Nabile – Manpreet Bachu
 * Paul – Sean Knopp
 * The Abbot – James Greene
 * George – Geff Francis
 * Angie – Eve de Leon Allen
 * Artie – Kassius Carey Johnson
 * Little Girl – Danielle Eames
 * Barista – Fred Pearson
 * Waitress – Jade Anouka
 * Newsreader – Olivia Hill
 * Child Reading with Comic – Isabella Blake-Thomas
 * Man with Chips – Matthew Earley
 * Pilot – Antony Edridge
 * Great Intelligence - Richard E. Grant

Buildings

 * The Shard is Miss Kizlet's base.

Communication technology

 * Clara jokes about Twitter.
 * Everyone at the base was on Facebook, Twitter or Tumblr, and they all posted their locations.
 * Peoples' voices could be heard on the radio, on televisions, and on the internet.

TARDIS

 * Clara calls the TARDIS a "snog box."
 * There's a garage in the TARDIS.

Time Lords

 * The Doctor claims that Time Lords have 27 brains. He then admits that he was exaggerating.

Vehicles

 * The Doctor owns an anti-gravity motorbike, which he states he rode in a motor race during the Anti-Grav Olympics in 2074, when he came last in the competition.
 * The Doctor claims to have just invented the quadracycle.

Story notes

 * This story takes a lot of the directing tropes of the BBC television series , a show written and created by Doctor Who show runner Steven Moffat and writer Mark Gatiss, with two episodes at the time of broadcast written by Steve Thompson. A prime example of this is formulas and words appearing on-screen.
 * The title of this episode is a reference to the phone incorporated into the TARDIS police box disguise, and to the "St. John Ambulance" logo on the door of this version of the TARDIS. The "Bells" part is referring to the police box phone ringing.
 * As is routine for post-2005 Doctor Who, a "NEXT TIME" trailer for the next episode is shown at the end of the episode.
 * George, Artie, and Angie's household Wi-Fi network is named "Maitland_Family."

Ratings
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Filming locations
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Production errors

 * During the motorcycle scene, a crew member and camera can be seen reflected in the Doctor's helmet.
 * In the same motocycle scene, the TARDIS's doors are open when the Doctor comes forward but then, when he starts riding, they are shown closed and apparently he did not remotely control them.
 * When Clara is entering the the Doctor's TARDIS, her mug shakes several times, which would cause it to spill, yet it doesn't. Later, on the Aeroplane, she starts to take a sip but is pulled away by the Doctor, and it still doesn't spill. However, when she returns to the TARDIS, she takes a sip, proving once and for all that it wasn't empty and that it should have spilled several times.
 * When the Doctor and Clara are talking after she wakes up, he sets the laptop on the ground and the monitor is upright, however, after the camera switches back to him from Clara, the screen is bent back.
 * While in the airplane, you can't see the city below through the open windows.
 * When the TARDIS has travelled to the airplane, just before the Doctor gets out, a scene change is visible and the wall position changes.

Continuity

 * This isn't the first time that the Doctor has encountered an alien whose plan was to upload humans to a popular technology. Previously, the Tenth Doctor encountered the Wire, who extracted the faces of humans. Both times, the victims were trapped in screens. (TV: The Idiot's Lantern)
 * Another striking similarity to TV: The Idiot's Lantern is the use of the motorbike: in both stories the Doctor rides it with his current companion through the streets of London and subsequently he rides it on his own after he loses the companion girl. In TV: The Idiot's Lantern the companion was Rose Tyler, who begins to enquire on her own before being captured by the Wire, while Clara is captured after a few moments and then the Doctor rides alone.
 * The Doctor rides a motorbike out of the TARDIS. Previously, a motorbike drove into the TARDIS, turned around, and drove back out. (TV: Doctor Who)
 * The Doctor tells Clara that they are riding a motorbike because he does not bring the TARDIS into battle, fearing that it may fall into the wrong hands. The same concern had been expressed by the Ninth Doctor to Rose Tyler (TV: The Parting of the Ways).
 * The Doctor mentions that the TARDIS's telephone should not work. (TV: The Empty Child)
 * The Doctor can't fly an airplane. He'd previously claimed that he was due for a lesson in flying a bi-plane in 1911. (TV: The Impossible Astronaut)
 * The Doctor mentions that Angie, one of the children Clara babysits, went to stay over at Nina's. (TV: Asylum of the Daleks)
 * After saving Clara from being downloaded, the Doctor sends a message to her attempted captors stating that she's "under my protection." (TV: ''The Christmas Invasion, The Eleventh Hour)
 * Summer Falls, a book that Clara owns, was written by Amelia Williams. (TV: ''The Angels Take Manhattan)
 * The Doctor once again wears Amy's reading glasses. (TV: ''The Angels Take Manhattan, The Snowmen)
 * Miss Kizlet's client is revealed to be the Great Intelligence, which still has Walter Simeon's image, despite it being over a century since it first took his form. (TV: ''The Snowmen)
 * The Doctor mentions having two hearts. (TV: Spearhead from Space, et al.)
 * The Doctor briefly dons a fez, but gives it to a young boy standing outside the TARDIS. (TV: The Big Bang, A Christmas Carol)
 * The Doctor notes that travelling short hops in the TARDIS can be difficult. (TV: State of Decay, Army of Ghosts, Dinosaurs on a Spaceship)
 * The Doctor already disguised himself as a monk in Saxon England, along with another Time Lord. (TV: The Time Meddler)
 * Monks, unlike bow ties, fezzes, and 1960s NASA technology, are not cool. (TV: The Time Meddler, The Eleventh Hour, The Big Bang, The Impossible Astronaut)

Home video releases
to be added