This is the first episode that features 'The Rachel' haircut, a style that became a cultural sensation--ironically, Jennifer Aniston hated it.
This is the first episode where the opening scene doesn't take place in Central Perk.
This is the first time Monica and Chandler's bedrooms in their apartments are shown.
In the DVD version of the episode, June Gable makes her first appearance as Estelle Leonard. An additional scene shows Joey meeting her in her office.
The interior of Chandler's room changes through the series, in this episode it appears to be bigger.