Avalanche Express

Avalanche Express is a 1979 cold war adventure thriller film produced and directed by Mark Robson, about the struggle over a defecting Russian general. It starred Lee Marvin, Robert Shaw in his last performance, Maximilian Schell, and Linda Evans. The screenplay by Abraham Polonsky was based on the novel by Colin Forbes. Both Shaw and Robson died near the end of shooting.

During production in Ireland, both director Mark Robson and starring actor Robert Shaw died of heart attacks within weeks of each other. Monte Hellman was brought in to finish the direction and Gene Corman Roger Cormans brother was called in to complete Robsons duties as producer.Robert Rietty was hired to revoice Robert Shaws dialogue in the opening scene, as it was decided to redo that scene in Russian with English subtitles instead of having the Russians speak broken English. As a consequence, for continuity, all of Shaws dialogue throughout the film was revoiced by Rietty. ........

Source: Wikipedia