Thousands of sailors perished at sea before Harrison's triumph changed history, but Longitude demonstrates that Harrison's glory was slow to arrive--and his prize money even slower. A fascinating study of 18th-century British politics and clashing egos in the arena of science, the film is both epic and intimate in consequence, and Sturridge's magnificent script inspires Gambon and Irons to do some of the best work of their outstanding careers. The ever-reliable Ian Hart appears in Part 3 as Harrison's now-adult son and apprentice, and Longitude approaches its dramatic climax with the exhilarating tension of a first-rate thriller. Rallying after sickness to prove the integrity of their marvelous seafaring chronometers, the Harrisons still had to fight for official recognition, and Gould's restoration of the Harrison clockworks provides a fitting coda to this exceptional story about the thrill of discovery and the tenacity of remarkable men. --Jeff Shannon