The Big Bang Theory

Amy gives Sheldon an answer to his proposal while Howard and Bernadette struggle with some unexpected news, on the season premiere.

Leonard gives an embarrassing radio interview; Amy and Bernadette bond over having to hide their success from Sheldon and Howard.

Sheldon stresses about picking a wedding date. Koothrappali and Stuart compete to win the heart of Bernadette's new coworker, Ruchi.

While Howard and Sheldon bond over their relationships with their disappointing fathers, Leonard's mom finds a new best friend in Penny.

Sheldon and Raj confide in Bernadette when they can't handle Amy and Howard working together; Penny figures out the secret to Sheldon.

Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton; Penny steps in to take care of Halley.

Sheldon and Bert collaborate on a research project; Penny and Bernadette coach Raj on how to navigate his relationship with Ruchi.

Leonard and Howard enlist Barry Kripke to help after they learn Sheldon betrayed them by working with the military behind their backs.

The gang flashes back to 2010 as Leonard tries to remember where he kept a potentially valuable investment.

Sheldon and Amy develop a unique system for wedding planning; Raj breaks up with Howard after realizing he’s hurting his confidence.

Sheldon and Howard plan birthday parties for Amy and Halley; Leonard receives a Christmas letter from his brother that causes him to spiral.

To discover who would be most qualified to be best man and maid of honour, Sheldon and Amy conduct a series of secret experiments.

Penny helps Sheldon figure out his next move in science; Amy and Leonard bond during a science experiment; Bert replaces Howard in his band.

Raj learns he is dating a married woman. Sheldon rents his old room back for a quiet place to work, which drives Leonard crazy.

Sheldon petitions Wil Wheaton to appear on his new show; Penny gets angry when she thinks a character in Leonard's novel is based on her.

When Bernadette won’t go into labour, all her friends try different tactics to get things started.

Leonard tries to secure the perfect wedding venue for Sheldon and Amy; Howard and Bernadette figure out who should stay home with the kids.

When Penny gets the opportunity to host Bill Gates at work, Leonard, Howard and Raj try to meet him, while Sheldon thinks it's a prank.

Leonard runs against Sheldon for president of the tenants association; Howard and Raj try to find the owner of a drone they find.

While Penny and Bernadette improvise a bachelorette party for Amy, Sheldon and the guys visit a reclusive scientist in his cabin.

Sheldon's comic book store experiences changes when writer Neil Gaiman puts Stuart's store on the map; Penny makes a scientific discovery.

While Sheldon goes to Vegas to win millions of dollars for science, Penny and Bernadette take Amy shopping for wedding dresses.

When Sheldon learns that his mother won't attend his wedding unless he invites his brother, he and Leonard go to Texas to end a family feud.

On the season finale, everybody's focused on making sure all goes according to plan for Amy & Sheldon's wedding, everyone except them.