When the 10th Doctor meets up with the Master in the timeline that never happened he gets aged many many years with the Master's "Laser" Screwdriver.

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How did he do that?

Do lasers affect timelords in some weird way?

  • Why the hell all time lords carry screwdrivers? – Lobo May 27 '14 at 19:14
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    @SachinShekhar: They don't. In fact, most of them didn't. What's that you say, most of them are dead? ...Guess they should have carried screwdrivers. – Jeff May 27 '14 at 19:49

The Master explained this in the episode. He built the technology from the Lazarus Project into his screwdriver, including bidirectionality, so he could age someone as well as de-age them.

Now, for the bigger question, how he fit all that in a handheld-sized package, ... well, "it's bigger on the inside!" is about the only explanation we could guess at.

  • hehe Guess I was not paying attention that well.. – The Doctor Jan 19 '12 at 20:00

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