The woman that Tristan is talking to in the Chilton hallway is Scott Patterson's wife, Kristine Saryan.
In this episode, we finally see Lane Kim's dad on screen. In the original run of Gilmore Girls, her father is occasionally mentioned as either Mr. Kim or by Lane as "my parents" yet he is never seen.
Marcy, the girl waiting in line, is played by Mae Whitman, who played Lauren Graham's daughter in Parenthood (2010).
When Lorelei is telling Rory about the b-level actors staying at the inn, she mentions "my generation we got Natalie Portman, not Natalie Hershlag." Natalie Hershlag is Natalie Portman's legal name, before she changed her name for screen name purposes.
The diner Emily and Luke visit when looking to expand Luke's Diner is the diner Fiona runs in Shameless (2011), Patsy's Pies.