While the geniuses are inside, the "normal" siblings (Georgie, Missy, and Erica) spend time in the backyard engaging in typical kid activities, like throwing rocks at an old TV. Cast & Guest Stars Sheldon Cooper Iain Armitage Paige Swanson (Guest) Mckenna Grace Dr. John Sturgis (Guest) Wallace Shawn Linda Swanson (Guest) Andrea Anders Barry Swanson (Guest) Josh Cooke Erica Swanson (Guest) Ella Anderson Technical File Details

Mary Cooper invites Paige’s family over for a playdate to find common ground with other parents of child prodigies, while Sheldon's siblings, Georgie and Missy, bond with Paige’s sister, Erica. Key Plot Points

Sheldon is shocked to find someone his age who is not only his intellectual equal but often quicker with a witty retort.

This guide covers of Young Sheldon , titled "A Rival Prodigy and Sir Isaac Neutron." Episode Overview Original Air Date: September 27, 2018