An intervention is used to try to force Sheldon to overcome his fear of driving.
Sheldon and Amy decide to start rumors about themselves as a social test. Meanwhile, Howard takes his relationship with Bernadette to an even higher level.
With Abishola only helping part-time, Bob, Douglas and Christina struggle to take care of Dottie.
When the IRS accuses Sheldon of making a mistake, he'll stop at nothing to prove them wrong. Dale is forced to get a colonoscopy and tries to convince Meemaw to join him.
Thanksgiving plans include dinner at the Wolowitz home but Sheldon is less than pleased about the location. Penny’s past comes back to haunt her.
Leonard has to deal with the fallout of disproving Sheldon's new scientific discovery. Raj spends a week at Howard and Bernadette's apartment.
When it is revealed that Penny and Bernadette went wedding dress shopping without her, Amy becomes heartbroken and pressures Sheldon for sex.
Celebrity contestants Tiki Barber, Lauren Ash and Jim Jefferies.
The guys’ science skills are put to the test during Leonard’s bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.
Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny.