Sheldon has a scientific breakthrough at the dentist’s office when he has to get a tooth pulled. Meanwhile Dale and Meemaw go to the casino and Georgie makes a big mistake when Dale leaves him in charge of the store.
Caroline encourages Bobby's sister, Denise, to quit her job, then realizes the company Denise works for is her mother's; Max reads a text on Bobby's phone suggesting he has a child with his ex.
When a nuclear powered Russian satellite is knocked out of orbit, the new Director of Homeland Security reunites the team; Paige and Walter confront their feelings.