In Young Sheldon Season 4, Episode 17, "Black Mold and an Old Hot Dog," Sheldon's obsession with a, find in the garage leads to a clash with George Sr. over safety, while Meemaw and Dr. Linkletter navigate a strange relationship milestone. The episode highlights themes of germaphobia and parental friction, punctuated by the central,, plot points of the mold and a questionable hot dog. Detailed episode summaries can be found on television fan sites.