 One night after a long day of filming "The Third Man" on location in Vienna, Reed and cast members Joseph Cotten, Alida Valli and Orson Welles had dinner and retired to a wine cellar.In the bistro, which retained the atmosphere of the pre-war days, they heard the zither music of Anton Karas, a 40-year-old musician who was playing there just for the tips.Reed immediately realized that this was the music he wanted for his film.