"The Pilot," often incorrectly regarded as an exception, has two official alternate titles: "The One Where It All Began" and "The One Where Monica Gets a Roommate." The original plan for the Season 9 Thanksgiving episode was to bring back Reese Witherspoon as Jill Green.Witherspoon was unavailable, so Christina Applegate was cast as Rachel's other sister, Amy Green.Monica's was filled with water and other drinks for the cast and crew.Joey's was usually virtually empty, unless the inside of the fridge was going to be seen in a specific scene.Til' the End' that he had a crush on Jennifer Aniston.He said, "Now I had a little crush on Jen in the very beginning, but I think the whole world did too, so what are you going to do?The episode where Phoebe thinks her dead mother has been reincarnated as a cat was written by Marta Kauffman at the time when her own mother recently passed away (the episode was dedicated to her).
After asking around among sound men, production staff, etc., they couldn't come up with a definitive answer and they began betting on it, starting at then raising the stakes.
They did, however, insert many jokes about Chandler having gay mannerisms (not knowing about sports, loving show tunes, etc.).
The refrigerators in Monica's and Joey's apartments actually worked.
Giovanni Ribisi plays Phoebe's brother, Frank Jr., in later episodes.
He also had a small role in an earlier season, as a boy who accidentally throws a condom into Phoebe's guitar case instead of a coin.