Template:No Plans, No Prototype, No Backup

"Probably the last man who knew how it worked had been tortured to death years before. Or as soon as it was installed. Killing the creator was a traditional method of patent protection."

—Terry Pratchett, Small Gods

A specialized version of the Reset Button: Any dangerous device or technology owned by a villain (particularly a supervillain of the James Bond mode) which is not off-the-shelf exists in a metaphorical vacuum. There is only one of it, there are no plans or schematics for it, no earlier generations of development exist (in the case of expensive and rushed projects, the final project might have been made with the cannibalized parts of the prototype, or might actually be the prototype after a whole lot of upgrades and patches), and (for dangerous computer programs) no backup copies anywhere. Thus the hero may safely blow it up, blast it with EMP or otherwise render it useless, confident that no one can recreate the technology -- or worse, just take version 0.9 out of storage and use that the moment he leaves.