Fandom

TARDIS Index File

Z-67

57,576articles in progress
Add New Page
Talk0 Share

Z-67, also known as Sullivan's gas, was a nerve gas that unravelled the DNA of Zygons, essentially turning them inside-out. If released it would create a chain reaction in the atmosphere, such as that a single use would kill all Zygons on an entire planet.

Z-67 was developed by UNIT naval surgeon Harry Sullivan at Porton Down, working on Zygon prisoners captured from their attempted invasion in the 1970s/80s. The Doctor, whose twelfth incarnation later called Sullivan an "imbecile" for creating it, confiscated the gas and the formula from UNIT.

The red Osgood Box supposedly contained Z-67 that would be released if the humans chose the "winning" button. However, this was a feint by the Twelfth Doctor, and the box was empty. (TV: The Zygon Invasion, The Zygon Inversion)

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Also on Fandom

Random Wiki