In every episode of the series, there has been a question involved with Carrie's writing. The moment Carrie changes the question mark to a period in this episode, she doesn't write anything until the very end of the series in a montage.
All of the footage of New York during and after the snow storm was shot by the regular Sex and the City (1998) crew, and not by a stock footage house. It is the only time in the series where the city is shown without the girls in the shot.
Michael Patrick King wanted to show the newborn puppies, but none were available and it seemed like they would have to use older puppies. The night before shooting, the pet wranglers found three newborn puppies at the pet sanctuary and they became a part of the shoot until the last episode.
The trivia items below may give away important plot points.
The funeral of Lexi Featherstone (Kristen Johnston) in the episode "Splat!" takes place at St. Mark's Church in the east village on a snowy day. As there was no snow on the ground, HBO trucked in a large amount to use for the filming. Two days after filming, it snowed eight inches.