Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.Watch Now:Amazon
Ethan is challenged by Kat into testing every flavor of yogurt without even buying it, and he has to do it so she wouldn't think he's a wuss. Kyle continues lying to Holly about her daughter Oprah not being accepted into the school he works in, until Holly visits the school. Lina returns to work, but finds it hard to do anything because she can't control her wheelchair. Richie helps Duncan with his job at Yonk's house. And also, we find out more about Richie's secret life.Watch Now:AmazoniTunes
After a successful experiment combining their genes, Sheldon will stop at nothing to convince Amy they should procreate. Also, Koothrappali is embarrassed to tell the gang what the new woman he’s dating does for a living.Watch Now:Amazon
Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon."Watch Now:Amazon
Sheldon feels slighted when Professor Proton seeks advice from Leonard instead of him, and he seeks revenge by befriending a rival science TV host, Bill Nye. Meanwhile, Raj becomes jealous when Howard crashes "girls' night."Watch Now:Amazon
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.