Leonard and Amy take an unexpected road trip to Arizona to pick up Sheldon. Meanwhile, Penny interviews for a job at Bernadette's company, and Howard is weirded out by Stuart's relationship with Mrs. Wolowitz.
Howard becomes nervous after NASA asks him to throw out the first pitch at a Los Angeles Angels game. Meanwhile, Leonard and Penny try to prove Sheldon wrong after he says that he and Amy are a 'superior couple'.
Amy and Bernadette accuse Penny of being a 'buzzkill' after she gets an email from work during their Vegas weekend. Meanwhile, the guys try to invent something cool, but only come up with new ways to procrastinate.
Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel. Meanwhile, Leonard and Penny seek advice from Howard and Bernadette when they argue about money.
After Bernadette finds Penny's gorilla movie online, Penny manages to find an even more embarrassing video about Bernadette. Leonard and Sheldon upload a paper to the Internet and obsess over someone making negative comments about it.
Howard and Bernadette run into problems returning from his mother's funeral. Sheldon and Penny agree to participate in an unusual experiment, and Amy and Leonard live to regret tagging along on Raj and Emily's date.