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|Z-Neutrino Biological Inversion Catalyser|
|Made by:||Meta-Crisis Tenth Doctor|
The Doctor's double arrived on the Crucible, but before he could fire the weapon, he was incapacitated by an energy bolt from Davros' cybernetic hand. Donna also tried to use it, but was also incapacitated by Davros while asking how to fire it. The Inversion Catalyser was then destroyed by a Vault Dalek. (TV: Journey's End)