DNA bomb
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The DNA bomb was an explosive designed by the hologram woman to latch on to John Hart's DNA. Knowing he would find some way around it, she split it in to three canisters and one eye, which she entrusted in a Blowfish, and told John it was an Arcadian diamond. She created a Riftstorm, which took the Blowfish and canisters to 2009 Cardiff and John killed her. John used his vortex manipulator to ride the Riftstorm to Cardiff. The Blowfish was shot and killed by Jack Harkness and John collected the canisters and the eye. The DNA bomb was then activated, but John Deadlock sealed Gwen Cooper to him, forcing Torchwood Three to find a way to stop the bomb. Owen Harper injected John with blood smaples of Torchwood workers and the bomb fell off. They then threw it through the Riftstorm John first came from. It blew up in the complexities of the Time Vortex, reversing time to the night John first came through. (TW: Kiss Kiss, Bang Bang)
