Tardis

Spoilers are precisely defined here. Rules vary by the story's medium. Info from television stories can't be added here until after the top or bottom of the hour, British time, closest to the end credits roll on BBC One. Therefore, fans in the Americas who are sensitive to spoilers should avoid Tardis on Sundays until they've seen the episode.

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Tardis
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Tardis

You may be looking for Carmentine Mind Leach.

The Mind Leeches were a species encountered by Dr Elizabeth Klein, Colonel Lafayette and an incarnation of the Master posing as the Doctor in an office block in the city of London. They came from another dimension and fed on intelligence, causing a number of the building's occupants to act unusually. When UNIT stormed the building, the leeches attacked the soldiers, resulting in Private Oscar Phillips losing his mind. (AUDIO: Dominion)

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