50th episode of the series
When Marshall is calling Jeff about his decision Royal Diner is in the background. This diner is in several episodes of the TV show Bones.
Alyson Hannigan and John Cho also worked together in "American Pie".
John Cho and Neil Patrick Harris worked together in Harold and Kumar go to White Castle.
Jude Law was in zero movies in 2005, 2 years before this episode takes place. Robin says that Jude Law was in a lot of movies "2 years ago" in this episode.