The Solo Oscillation

Overview

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.

Guest Stars

Laurie Metcalf

Mary Cooper

Pamela Adlon

Halley Wolowitz (voice)

Jeffrey Cade Ross Brown

Toby

Brian Posehn

Bert Kibbler