In the scene where Niles (David Hyde Pierce) is bidding farewell to the household staff, one of the men is Asian and dressed in outdoor work clothes. It is possible that this is meant to be Yoshi, the gardener, mentioned in a number of episodes, but never seen.
The episode title is based on the song entitled "The Last Time I Saw Paris," composed by Oscar Hammerstein II and Jerome Kern. The song was used in the 1954 movie of the same name The Last Time I Saw Paris (1954), though it was originally written for the 1941 movie Lady Be Good (1941).
This episode is begins the imminent divorce of Niles and Maris.
The celebrity caller in this episode is Paul Mazursky who plays Vinnie, a womanizer who calls in trying to locate a pinky ring he left in his latest conquest's house.
Shepherd's pie, as cooked by Daphne, is a British classic made with minced lamb. It tastes great when cooked correctly.