Synopsis

A palpable strain settles over the group as the boys wrestle with their deadline for the government project, and Sheldon resorts to an energy drink in a desperate bid to stay alert. Meanwhile, Penny and Amy venture to a gathering at Bert’s house, the geologist. Elsewhere, during a tidy-up of the nursery, Koothrappali uncovers Bernadette's unspoken emotions regarding her pregnancy.