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When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon, and Sheldon finds Penny a surprising source of scientific inspiration.
First Air Date : Sep 24, 2007
Last Air date : May 16, 2019
Episode : 279 Episode
Season : 12 Season
Runtime: 22 minutes
Studio: CBS
Country: United States of America