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 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 (TV story.

Synopsis
The Doctor's search for Clara Oswald brings him to modern-day London, where Wi-Fi is everywhere. Humanity lives in a Wi-Fi soup. But something dangerous is lurking in the signals, picking off minds and imprisoning them. As Clara becomes the target of this insidious menace, the Doctor races to save her and the world from an ancient enemy.

Plot
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Cast

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

Story notes

 * As is routine for post-2005 Doctor Who, a "NEXT TIME" trailer for the next episode is shown at the end of the episode.

Ratings
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Filming locations
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Production errors
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Continuity
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Home video releases
to be added