This series is supposed to be based in England and the characters are supposed to be English, apart from the lead of course. The script writers need to understand the English way of speaking if they want some sort of reality. Dominic talks about "doing the math" in this episode, well, English people don't say that, they say "doing the maths" or "doing the sums". There have been a couple of these little mistakes and, I really don't want to sound pedantic, but they bug me a little because it loses reality.