When Joey is asking Ross for advice on dating someone as smart as Charlie, he says he doesn't want her to think he's stupid. Ross looks down and comments that Joey's wearing two belts. There was a similar exchange in The One With Chandler and Monica's Wedding between Joey and Gary Oldman because he was drunk. The writers have said they simply forgot they did the joke before.
One of the episodes that was submitted from the show at the Emmys for outstanding comedy series.
Stockholm actually is the capital of Sweden.
In the scene of Joey talking to Charlie about exploring the city, when Joey opens the door for Charlie, in the Magna Doodle board reads: "Happy Birthday Gizzy 5-1-91"