"90210" refers primarily to the U.S. teen drama franchise built around Beverly Hills high school life. The original, Beverly Hills, 90210 (1990–2000), launched the cultural shorthand “90210” for glamorous teen melodrama; a 2008 reboot, 90210 (2008–2013), updated the setting and characters for a new generation. Across fandoms, international viewers have sought localized versions with subtitles (Vietsub = Vietnamese subtitles), enabling access when official Vietnamese dubs or releases are unavailable.