When Ryan asks Marissa if she snores, she says that she has never slept with anyone before so she doesn't really know. Ryan and Marissa slept on the same sofa in The Escape. Seth and Summer also slept in the same room.
Samaire Armstrong (Anna Stern) and Chris Carmack (Luke Ward) also worked together on Just My Luck (2006) as Maggie & David Pennington respectively.