When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Bert the geologist replaces Howard in the band Footprints on the Moon. Sheldon finds Penny a surprising source of scientific inspiration.
Elenco:
Jim Parsons
,
Johnny Galecki
,
Kaley Cuoco
,
Simon Helberg
,
Kunal Nayyar
,
Mayim Bialik
,
Melissa Rauch
,
Kevin Sussman
,
Aarti Mann
,
Kevin Sussman
,
Sara Gilbert
.
