Torchwood: The Three Monkeys

Andy is performing a dull stake-out in Llandaff when Owen unexpectedly joins him; neither of them turns out to be there by coincidence. From there, the story is initially one of investigation, which leads into something more dramatic, with the second half dealing with the consequences of what they have uncovered.

An unusual feature is that the story takes place entirely inside Andy's police car (although why the driver's seat is on the left in the cover picture is just another mystery). While scenes do take place outside it, at least one character is always in the car, listening to the other over a headset - and thus no more able to see what is happening than the listener is. It's a device that Big Finish have used before, and it does work well on audio, turning the limitations of the medium into an advantage at specific points in the narrative.

The story itself is, when you get down to it, uncomplicated without any real twists beyond the nature of the alien device Owen is looking for. What works well, though, is the interaction between the two main characters (there are only a couple of brief cameos from other voice actors) as they react to the situation they find themselves in and discuss whether they should take advantage of it. Owen's undead status plays into this, and there's also a parallel to the real-world Horizon post office scandal, of all things. Plus a toy monkey.