This show works well when referencing the past, even if sometimes the details aren’t as well researched as they could have easily been. (I suspect the Orient Express carriages should have been dark blue, and the width of the entire train was just 10.4 inches, making the sleeping car is at least four feet too wide. But none of that actually made the episode any less entertaining or interesting.)

However, they did make some odd choices in it; like they used an entirely fictional country, Urkesh, presumably not to offend anyone. But they then mentioned the death of the real Russian ex-spy Alexander Litvinenko, and how he was poisoned with Polonium 210 in London. The pointing out of which has probably added my name to some list kept in the Kremlin, if it isn’t there already.

The overarching theme is bloodlines, and how they exist even if you’re entirely ignorant of them. This fits neatly with Abe’s mission to find out his true ancestors, and creating a sense of belonging. This was probably the only bit I took exception to, as being adopted and not having any real ancestors hasn’t bothered me in this fashion at all. To be honest not having them actually seems like a blessing of sorts. But, each to their own.

The places this story went which I really liked were the small amounts of information that Jo prises out of Henry at each encounter, and how they’ll ultimately add up to unravelling his puzzle. Surely at some point she’ll want to know when, and how, Abigail Morgan died? That’s becoming the true puzzle of the season, and as such is probably being held until the season finale.

The more information she gets, the greater the chance that he’ll slip up, and provide some reference that doesn’t fit. So far he’s actually avoided lying for the most part, but as this goes on it is going to become more challenging.