This clip discusses the ancient origins of Halloween and explains how it developed to its contemporary form.

Monica's mom arranged to get their wedding announced in the paper, but they need to get a picture from a professional photographer as any camera makes Chandler's grin look like a hyena.

Lady Gaga and Ellen answer questions about themselves in a gameshow-like manner.

Taylor Swift and Ellen DeGeneres talk about Taylor's deepest's fears.

Sheldon, Howard, Raj and Leonard discuss time travel in the movie Back to the Future and the proper tenses verbs to describe their actions