Trivia / Third Man on the Mountain

• California Doubling: While Third Man on the Mountain was primarily filmed in Switzerland, some scenes were filmed in the United Kingdom.
• Fake Nationality: Of the leads, James MacArthur (Rudi Matt) is American, Janet Munro (Lizbeth Hempel) and Laurence Naismith (Teo Zurbriggen) are British, Lee Patterson (Klaus Wesselhoft) is Canadian, Herbert Lom (Emil Saxo) is Czech-British and James Donald (Franz Lerner) is Scottish.
• On-Set Injury:
  • James Donald fell 18 feet off a crag during principal photography and sustained minor injuries.
  • Pierre Tairraz, an assistant cameraman, broke three ribs after he fell into a crevasse.
• The Other Marty: David Niven was originally cast as John Winter during the early stages of production, but was eventually replaced by Michael Rennie for the final cut.
• Real-Life Relative: James MacArthur portrayed Rudi Matt while his mother Helen Hayes portrayed a tourist.