The head of lettuce that Frasier kicks over to Regan did not fall out of her grocery bag. You can see that it was rolled over to Kelsey Grammer from below the camera at the exact moment that the other groceries hit the floor.
In this episode we learn what happened at the conclusion of The Late Dr. Crane which ended with a scene of Frasier grabbing a bottle of wine from the gift basket and limping to Regan's apartment door. Apparently Regan was with her then boyfriend Scott, so the evening did not turn out that well for Frasier after all.
Daphne shows that she has some feelings for Niles.
Frasier: That's what you brought us here for, to gawk at some poor woman's struggle with junk food?
Roz: Big deal. So she's overweight. You don't need to point it out. It's rude.
Frasier: It's childish.
Niles: It's Maris!
Frasier: (slyly telling Martin about running into Regan in the hallway) Perhaps she was hinting that she wants another ride on the Frasier-go-round!
Character: Dinah aka Officer Nasty
Dinah aka Officer Nasty is a reference to the Black Canary aka Dinah Lance who has a strippesque costume.
The title of the second scene is "MY KINGDOM FOR TWO QUARTERS". This is borrowed from Shakespeare's Richard III in which Richard crys, "A horse, a horse, my kingdom for a horse!"
Title: To Thine Old Self Be True
The episode title is a spoof of the famous phrase: "To Thine Own Self Be True" from Shakespeare's Hamlet.
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