According to Bruno Heller, much of the wedding party footage was actually shot at the wrap party and cut into the footage shot specifically for the episode.
When Wiley finds out that there's no a wedding gift registry, he asks Lisbon if there will be "a trousseau." Lisbon responds "What is that, exactly?" In the Pilot (Season 1, Episode 1), when the CBI team is first shown arriving at the Palm Springs airport, Van Pelt is embarrassed that she has to pick up a checked bag (since everybody else had simply brought carryons). Lisbon sarcastically tells her to meet up with them later "when your trousseau arrives." Now we find out that Lisbon apparently only ever thought that a "trousseau" was a fancy piece of luggage, and never knew it was what a bride collects her gifts of linens and clothes in on her wedding day.
The marriage license shows Patrick's birthday as 9-16-74 which makes him 5 years younger than Simon Baker who was born 7-30-69.
It has since been confirmed that this episode will see the return of two of the shows previous characters, Wayne Rigsby (Owain Yeoman) and Grace Van Pelt (Amanda Righetti)
Series finale.