As a long-time John Simm fan, I watch Grace regardless of how much misery they pile on in the script. And this script, when I could figure out who the heck they were on about with so many random names of characters and connected businesses tossed about, was desperately difficult to follow and relentlessly miserable with it.
A gloomy tale of a ridiculously valuable watch stolen (who cares?) and Grace and his cohorts trying to figure out who took it amongst many possible suspects. I don't really recall too much of the wheres and whys, even though I just this minute finished watching it, because it was convoluted, tiresome and boring.
Probably the worst of all the Grace episodes, in my opinion. If you liked it, fair dues to you. To each his/her own. But I will keep watching because of John Simm. Plus my lingering curiosity about when the heck he's going to figure out that his long lost wife isn't.