Young Sheldon 2x15 "A Math Emergency and Perky Palms" Season 2 Episode 15 Promo - Sheldon and Dr. Sturgis (Wallace Shawn) have their first fight when Dr. Sturgis marks a question wrong on Sheldon’s test. Also, Mary takes over for Pastor Jeff (Matt Hobby) when he’s out sick, on YOUNG SHELDON, Thursday, February 7th on CBS.