Quick recap
Amy joins the gang and becomes best friends with Penny, who now tends bar at the Cheesecake Factory. Sheldon and Amy see themselves as friends, no romance, yet they understand each other like no one else. Howard and Bernadette split, reunite and get engaged. Leonard starts dating Raj's sister, Priya, and Penny realizes she regrets breaking up with him. Steve Wozniak and LeVar Burton appear as themselves. In the finale, Leonard learns Priya is moving back to India, Raj moves in with Sheldon, Howard fights with Bernadette over an expensive watch, and Penny wakes up next to Raj after a drunken night.

