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'''Z-67'''- also referred to by the [[Twelfth Doctor]] as 'the Imbecile's Gas'- was a [[nerve gas]] that unravelled the [[DNA]] of [[Zygon]]s. | '''Z-67'''- also referred to by the [[Twelfth Doctor]] as 'the Imbecile's Gas'- was a [[nerve gas]] that unravelled the [[DNA]] of [[Zygon]]s. Naval surgeon [[Harry Sullivan|Sullivan]] working for [[UNIT]] developed it after the attempted Zygon invasion of the [[1970s]] or [[1980s|80s]], working on captured Zygons at [[Porton Down]]. The Doctor took it from UNIT, as well as the formula; he pretended it could be released by the [[Osgood Box]]. ([[TV]]: ''[[The Zygon Invasion (TV story)|The Zygon Invasion]]''/''[[The Zygon Inversion (TV story)|The Zygon Inversion]]'') | ||
[[cy:Z-67]] | [[cy:Z-67]] | ||
[[Category:Bioweapons]] | [[Category:Bioweapons]] |
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