The bird cage in the Kim's antique store when Zac goes to talk to Mrs. Kim is the same bird cage that Emily sends to Lorelai when she is cleaning out her basement.
This is one of the rare episodes to feature all the main characters.
Luke says he has never seen the Liberty Bell. Scott Patterson, the person who plays Luke , was born in Philadelphia, which is where the Liberty Bell is located.
One of the horror movies mentioned is SAW. Scott Patterson was in several movies of the franchise.