Wonderful biodrama follow-up to "Young Tom Edison" stars Spencer Tracy as the genius whose inspiration and perspiration gave the world the light bulb, the phonograph, and the Dictaphone. The film looks back on Edison's achievements through an interview conducted by reporters on the 50th anniversary of his invention of the incandescent bulb. With Rita Johnson, Charles Coburn, Gene Lockhart. 107 min. Standard; Soundtrack: English Dolby Digital mono.