There are many guilty pleasures I'd rather not talk about here and watching the British thriller series Marcella is one of them. However, the conclusion of the third season, in which there is a shocking amount of deaths that might not surprise a regular viewer of the Marcella series, had one niggling detail I can’t let go of.

I might just be kibitzing here, but while disbelief is suspended most of the time, the final scenes are concluded with such haste that disbelief, hung in a balloon, is punctured by the blast of events.

I'll not summarize the events, but there's this: Rory Maguire lies dead on the floor and while Marcella is telling his stroke-muted mother about this, she opens his laptop and holds his eyeball up to the camera for an eye-scan that allows her access to his financial accounts. It’s this eyeball bit that bothers me because the eyeball, and the suspiciously long nerve attached to it, is a prop Marcella neatly pulls from her pocket, wrapped in a piece of paper towel. It's completely rigid, as if Marcella pulled it out of Rory's head and let it cure a few days on the counter, except for the inconvenience of the rapid-fire timeline. How did this eyeball held by a cord of vein or nerve, like a marshmallow on a stick, become so solid and maintain the necessary preservation for an iris scan? Liquid nitrogen? What is worse is that when Marcella leaves the house, walking past Rory, his eye sockets look perfectly undisturbed.

It's not that I would have wanted things more gruesome, it's that I would have wanted the writers to pick a side. If we are to have gruesome deaths, why not have a gruesome eyeball? If we are to have not-too-gruesome, then give me a scene where Marcella uses her phone to take a picture of his iris and an app to properly reverse it so that the iris-recognition could be fooled and the viewer along with it.

I like detail. Big plans are fine, big plots too, but platters of detail are my delight.