604 - Blonde Ambition and the Concept of Zero
Aired Thursday, October 20, 2022

Sheldon makes a terrifying mathematical discovery while tutoring Billy. Also, Mary is jealous of Missy's relationship with Mandy and MeeMaw.
- Guest Stars:
- Wallace Shawn as Dr. John Sturgis
- Ed Begley, Jr. as Dr. Linkletter
- Melissa Peterman as Brenda Sparks
- Wyatt McClure as Billy Sparks
- Writers (Story):
- Steve Holland
- Eric Kaplan
- Nadiya Chettiar
- Writers (Teleplay):
- Steven Molaro
- Jeremy Howe
- Connor Kilpatrick
- Director:
- Shiri Appleby