9 October: Invent a new function for the sonic screwdriver.
↳ No, thank you.
The sonic screwdriver was originally just that: a screwdriver. And to be perfectly honest, that is all it ever should have been. It was destroyed in the Fifth Doctor era because it was being used too often as a get-out-of-jail-free card, and I really think it ought to have stayed that way. I can’t invent a new function for a device whose functions have been given no limits beyond “it doesn’t do wood”!
I can, however, give you a use. The sonic screwdriver makes an excellent firestarter.