But how did she get his sonic screwdriver in "Silence in the Library"/"Forest of the Dead"? Have we seen the last of River after all? Speaking last month at Orlando's Megacon, Alex Kingston discussed the possibility of River making another appearance, alongside Twelfth Doctor Peter Capaldi:
“All I can say is… spoilers! But what I will say is the sonic screwdriver that I had in Silence in the Library, which had been given to me by the Doctor, is not the sonic screwdriver that has been seen . . . yet.Speculation on this front has been ongoing since Capaldi was first tapped to play the new Doctor. Some have even wondered whether the "my Doctor" River refers to in "Silence in the Library"/"Forest of the Dead" was not, in fact, the Eleventh, but the Twelfth. When asked how River would respond to the Doctor's new face, Kingston said,
I haven’t been told I’m done [on the show].
“Well, River’s dealt with a lot of Doctor’s faces in the past so I don’t think that it would be a surprise to her.”Would you like to see River make another appearance, maybe not as a recurring character as she was in series 5 and 6, but as a cameo? Or do you think River's run on the series is done, and should be put to bed?
[Source: Blogtor Who]