In its 10th series, the comedy series tackles several adult themes, showing how the nerdy friends have grown up over the years. Leonard (Johnny Galecki) and Penny (Kaley Cuoco) renew their vows, this time inviting their friends and family; they also learn that marriage is about compromise, and figure out how to support each other. Sheldon (Jim Parsons) and Amy (Mayim Bialik) take their relationship to the next level, and after an emotional struggle they move in together in Penny's old apartment. Howard (Simon Helberg) and Bernadette (Melissa Rauch) realise that being a parent is a full-time job, but with the help of their friends they manage to find joy in raising their child. When his friends tell him he's extremely spoiled, Raj (Kunal Nayyar) decides to stop taking his father's money and learn how to make ends meet.