The Big Bang Theory

E4 Extra

9:00 PM to 9:30 PM

Saturday 5 October

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When Sheldon kicks Amy out of the apartment so that he can have some 'alone time' to work, she and Leonard bond during a series of science experiments. Bert the geologist replaces Howard in his band Footprints on the Moon, and Sheldon finds Penny to be a surprising source of scientific inspiration. Laurie Metcalf and Brian Posehn guest star