In the Young Sheldon Season 3 finale, "A Secret Letter and a Lowly Disc of Processed Meat," Sheldon discovers Mary hid college recruitment letters, including one from Caltech, sparking a major conflict with George. Following a video testimonial project, Mary agrees to a compromise for Sheldon to attend East Texas Tech while living at home, as the episode serves as the unexpected season finale due to production halts. Read the full recap at TVLine . A Secret Letter and a Lowly Disc of Processed Meat