Theory:Torchwood television discontinuity and plot holes/Cyberwoman


 * Why did Tosh not know what the device, to open the doors, was when she used it to extract information from books in TW: Everything Changes?
 * It is presumably intended to be a different device which simply looks similar.
 * Given that she should never have taken it out of the Hub, it's likely she would feign ignorance.
 * Except we saw Jack see her turn it in, so why bother?
 * Given though, that Jack explains how it works, it would have been rather redundant if it were the same device she had turned in previously. Therefore leading back to the best explanation being a different, but similar looking, device.


 * Dr Tanizaki's conversion makes no sense, parts of the Cyberman helmet were placed under his skin, if he were to be upgraded, the Cyber-Skin would be placed over his skin, like Lisa.
 * The conversion was a failure, and it isn't certain that the conversion unit was attempting to turn Tanizaki into a compromise cyberman/human form like Lisa's.


 * How is it, that when Jack gets shocked twice by Lisa, he dies, yet he was able to survive many other things, like stet radiation which would usually kill people. so how could he survive that, but not survive the electricity?
 * His immortality presumably exists at a cellular level, and so the stet radiation (which would destroy the cells) doesn't disable him, as the cells are regrowing as they are destroyed. This process causes him obvious pain. The electrocution, however, works on a higher level and damages body functions.


 * When Cyberwoman shoots Jack's gun, wouldn't it explode? Like in Doomsday a single shot was enough to blow up a car or Made of Steel when their guns blew up the weapons.
 * Lisa is only partially converted, so her wrist-blaster could be weaker.


 * How is it that Lisa removed her own brain and exchanged with the pizza delivery womans? It wouldnt work because im sure when you disconnect the brain the nervous system then dies, which begs the second question how did pizza woman survive the operation?
 * Lisa used the Cyber-conversion unit to accomplish this, which presumably has some kind of life support.


 * How it's possible for Lisa - in pizza delivery woman body - to be still thinking like a Cyberman? It was said that what changed people way of thinking when transformed into Cyberman were implants, which deleted emotions from them - going this way of thinking Lisa should loose the Cyberman way of thinking when her brain was transplanted into human body.