Young Sheldon 4x08 "An Existential Crisis and a Bear That Makes Bubbles" Season 4 Episode 8 Promo trailer HD - Meemaw takes matters into her own hands when Sheldon’s philosophy teacher, Professor Ericson (Melanie Lynskey), sends him into a tailspin. Also, George Sr. learns Georgie has been cutting class, on YOUNG SHELDON, Thursday, February 18th on CBS.