In Smith and Jones, the sonic screwdriver is wrecked, and ...... At the end of the story, he has a new one.

I definitely saw that (ie the second part) coming - and foolishly thought for a moment that the 'new' one may return to the "classic" design.

(Bit of throwaway dialogue to the effect that he acquired a more advanced model some time between the TVM and "Rose", and this one has been gathering dust in the toolbox ever since.)