Walden and Zoey’s relationship suffers after they share a near-death experience. Meanwhile, Alan wonders if Lyndsey has a drinking problem.

Walden is trying his best to impress his new love interest when Bridget reappears in his life.

Charlie is visited by the ghosts of his ex-girlfriends while Alan and Jake are on a road trip.

Charlie and Jake fight for the affections of a waitress, while Alan fights sexual tension with his receptionist.

Charlie tries to surf to impress Dottie, a beautiful woman he just met, but after he nearly drowns he is convinced that he saw his late father.

Charlie is nominated for an advertising award, but he decides to boycott it because his arch nemesis always wins. The rest of his family tries to trick him into going….

When NASA moves up Howard’s mission, he must face his fears and Bernadette’s dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the…

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.