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

The Zeronites were a genetically engineered ape-like species.

When the Kulkan were more warlike, they built a genetic weapons centre which later became Hippocrates Base. At the centre, they created the Zeronites to maintain their interstellar missiles.

Centuries later, the surviving Zeronites attacked the base to gain revenge on the Kulkan. The Eighth Doctor was able to stop their plans. (COMIC: Sins of the Fathers)

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