"The Clean Room" is the seventh episode of the American documentary television series Cosmos: A Spacetime Odyssey. It premiered on April 20, 2014, on Fox and aired on April 21, 2014, on National Geographic Channel. The episode explores the methods and processes used to measure the age of the Earth. The episode also pays tribute to geochemist Clair Patterson (voiced by Richard Gere) in his quest to remove the neurotoxin lead, from gasoline. The episode's title alludes to Patterson's attempts in sterilizing his lab after realizing that the inconsistent results in his experiments were due to lead contamination. More information...
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