Niles scowls when Frasier's blind-date wants a wine spritzer. Twenty television seasons earlier, this was actually the first drink Frasier himself ordered at the bar in Cheers (1982).
Rosie Perez was the original choice for the role of Daphne until the character was changed from Latina to English.
Over the course of the series, neither Niles (David Hyde Pierce) nor Roz (Peri Gilpin) celebrate their birthdays. However, there is a scene in this episode in which Roz walks into Frasier's (Kelsey Grammer) apartment to celebrate her birthday, which is May 5. She comments "Sorry, I'm late. Cinco de Mayo traffic was muy malo (very bad)."
When playing their younger selves in Crock Tales (2004), the cast had to use various hairpieces, hair dyes, et cetera, to resemble their younger selves in flashback sequences. David Hyde Pierce also wore a hairpiece for the same reason in The Return of Martin Crane (2001).
Near the end, the hairy pizza delivery guy is an almost unrecognizable Kenny, who later becomes the station manager.