Mandy Moore's character Rebecca sings a cover of the song Moonshadow. Moore herself covered that song on her CD "Coverage."
Mandy Moore has said that the fight that Rebecca and Jack had brought her back to moments in her first marriage when they filmed it.
Before the episode aired producer Dan Fogelman shared a text exchange he had with Milo Ventimiglia about the fight. Milo's reaction was just the word "insane" and then he followed it up with "They're (the fans) gonna riot"