Harrelson and Mortimer are a young couple who board the Trans-Siberian train which runs from Beijing to Moscow through Siberia.  They befriend a younger couple who are eager to make friends but not for the right reasons, as you discover.  Kingsley plays a Russian policeman, bent on catching drug smugglers, who frequently use the Express to distribute drugs.  Performances are good but the script suffers from a too long build up to reveal some of the characters real objectives.

The Blu-Ray picture is good, not great as much of the landscape footage is snow laden and lacks detail.  On board scenes could have been better too but facial closeups show a lot of detail.  Sound is Dolby 5.1 and is acceptable but uninspiring.

Extras include an extensive making of featurette but little else on the disc.  A lot of the featurette contains references to the greatness of the director instead of the actual movie.  

"Trans-Siberian" is a slow character study of two couples with hidden agendas which are revealed throughout the film and when they do, the plot thickens and becomes a bit of a thriller near the end.  However, much of the plot is predictabl. Acting kudos go to Emily Mortimer as things get out of control with her life.  An interesting drama-rent it first.