A Polish nonfiction novel by Slavomir Rawicz inspired this misery marathon about a ragtag group of prisoners who escape from a Soviet gulag in 1941, the most determined of them trudging 4,000 miles across Siberia, the Gobi desert, and the Himalayas to freedom. National Geographic Films being one of the production companies, there are plenty of widescreen vistas suitable for framing, but the endless trek tends to flatten out as narrative. Despite the two-hours-plus running time, major plot developments like the actual escape and the eventual departure of Colin Farrell’s hardened Stalinist flit by so quickly that they barely register. The director is Australian veteran Peter Weir, whose career has oscillated between character-focused Hollywood dramas (Witness, Dead Poets Society, The Truman Show) and international safaris like this (Gallipoli, The Mosquito Coast, Master and Commander: The Far Side of the World). With Ed Harris, Jim Sturgess, and Saoirse Ronan.