Jordan's sister Elizabeth gets into trouble with an out-of-control Royal, so Naomi helps out by taking the heat to protect Elizabeth's reputation. Silver is called in to see her doctor about some test results and Annie decides to get over Liam by going to Paris for a book tour. Meanwhile, Adrianna performs after Fall Out Boy at a big event, but the concert ends in chaos.
Season 5 Episode 21 of 90210 resulted in a 0.30 rating in the 18-49 demographic.
The series revolves around the three-generational Wilson family who have recently moved to Beverly Hills, California after the father Harrison Wilson accepts the position of being the principal of West Beverly Hills High School.