Philippe joins researchers studying category five hurricanes, which have winds in excess of 157 miles per hour. Then, it's off to follow tornado trackers and discover the surprising way wind causes lightning to form.
The crew pays it forward by helping to resurrect a Camaro that is more than just a car for its owner. Then, the team heads to Las Vegas to meet some Matco Tools merchants who believe in giving for a living.
When Bernadette receives her PhD, the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor. Meanwhile, Koothrappali becomes Sheldon's new roommate.
Max and Caroline get their big break when they're cast as zombie extras after they finally arrive at the movie set where Randy is working. Back at home, Han and Oleg try their hand at construction after firing the contractor working on the dessert bar.
A book signed by Charles Lindbergh flies into focus for the Pawn Stars, while a medal issued by Germany torpedoes into the shop. A guy tries to throw Rick off balance with a rare 17th-century money scale.