The Turn of the Screw (audio story)

 was the third story of the eighth season of Big Finish Productions' Short Trips series. It features the Eighth Doctor and UNIT.

Publisher's summary
Charlie Sato has been chasing a bit of alien junk from England to Puerto Rico. He's finally got his hands on it - but now he's got to get it safely off the island. The aliens he stole it from want it back, and someone else has hired a group of thugs to get hold of it. And then there's the original owner - he might come looking too.

All this for a screwdriver? Someone, somewhere must want to unscrew some pretty important screws.

Plot
to be added

Characters

 * Eighth Doctor
 * Charlie Sato
 * Ruth Matheson

Continuity

 * The Doctor drives his Volkswagen Beetle. (PROSE: Vampire Science)
 * The damaged sonic screwdriver is first found in Leadworth, where a future incarnation of the Doctor lost it. (TV: The Eleventh Hour)
 * There is a programme running on the damaged screwdriver (TV: The Day of the Doctor), but the Eighth Doctor is not sure what it is for and does not plan to abort it.