Sheldon: Look, I am simply going to defend our work, scientist to scientist. And, failing that, suggest that his mother enjoys a string of both human and non-human lovers.

Leonard: "Upon review, I've changed my mind about the Cooper-Hofstadter hypothesis that space-time is like a super-fluid. In fact, it's inspired me to come up with my own theory. Maybe space-time is like two clowns with their heads in a bucket. Much like Cooper and Hofstadter."

Amy: Why? What did I do?
Bernadette: I'm sorry. I had to get the spotlight off me, and tearing down other women is part of my pageant training.

Leonard: One calls it insightful and innovative. We're insightful and innovative.
Sheldon: Nice to meet you, Mr. Insightful.
Leonard: Ah, the pleasure is mine, Mr. Innovative.

Amy: It's not about me and Sheldon. It's about a young woman in the 1800s named Amelia, and the time-traveling physicist named Cooper she falls in love with.

Penny: "So instead she asked if in the future Montana ever became a state."
Amy: Hey, in the 1800s that was considered flirting.