Karen: Tell me, what would you do in my position?
Harry: What position is that?
Karen: Imagine your husband bought a gold necklace and come Christmas gave it to somebody else...
Harry: Oh, Karen...
Karen: Would you wait around to find out if it's just a necklace, or if it's sex and a necklace, or if worst of all it's a necklace and love? Would you stay, knowing life would always be a little bit worse? Or would you cut and run?
Harry: Oh, God. I am so in the wrong. The classic fool.
Karen: Yes, but you've also made a fool out of me, and you've made the life I lead foolish too.
When Jamie and Aurelia meet up with Juliet, Peter and Mark at the airport terminal, Mark's coat collar jumps back and forth between being up in the back or lying entirely flat depending on the angle of the shot.
Any viewers outside of Britain might not get the joke when Billy Mack isn't sure which one is Ant or Dec. They are very well known in the UK, and dominate Saturday night telly. The joke refers to the fact that even though they are popular, a lot of people don't know which one's which.