***Slow-build suspense on the Trans-Siberian Express*** A couple doing missionary work in China (Woody Harrelson & Emily Mortimer) takes the Trans-Siberian train from Beijing to Moscow, but their involvement with a dubious couple (Eduardo Noriega & Kate Mara) gets them entangled with a no-nonsense narcotics detective (Ben Kingsley). A relative told me a story of his travels in Russia back when it was part of the USSR: He said the deeper he journeyed into the country the more it seemed like he was going back in time. At one point he happened to turn around in some kind of an installation and…