While on their date Mark (Jason Ritter) tells Sarah (Lauren Graham) that "he is in". In Written in the Stars (2004), when Luke (Scott Patterson) takes Lorelai (Lauren Graham) on their first real date he tells her "I am in, I am all in".
While on their date Mark (Jason Ritter) tells Sarah (Lauren Graham) that "he is in" reminiscent of when Luke (Scott Patterson) takes Lorelai (Lauren Graham) on their first real date he tells her "I am in, I am all in".