Avalanche Express

Russian general Marenkov (Robert Shaw (actor)) decides to defect to the West and CIA agent Harry Wargrave (Lee Marvin) leads the team that is to get him out. Wargrave decides that Marenkov should travel across Europe by train, on the fictional "Avalanche Express". The idea is to lure the Russians into attacking the train and thus discover who their secret agents in Europe are. Consequently, during the train journey they must survive both a terrorist attack and an avalanche, all planned by Russian spy-catcher Nikolai Bunin (Maximilian Schell).