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Season 21 · Episode 10
0.0October 11, 1984
Straight Down the Line!: Simon tracks down the most famous line in the world, the zero line of longitude - otherwise known as the Greenwich Meridian - that celebrates its centenary next Saturday. Most visitors to Greenwich admire the famous Time Ball dropped one hour after noon each day-now is your chance to see how it works and why Greenwich Mean Time is of worldwide importance.