* CommonKnowledge: Ratings dropped the second that Keri Russell cut her hair short? Well yes there was an overlap there, but the show also had its timeslot moved from Tuesday night to Sunday night, which was the WB's weakest day. The ratings decline actually began before the haircut, because of the timeslot moving and other storytelling changes. Even the WB themselves blamed the haircut for the ratings, and instigated a rule that no young stars on their network shows could change their hair without permission first.
* FanPreferredCouple: Ben and Felicity.
* HilariousInHindsight:
** One of Creator/JJAbrams' last "realistic" projects before he took a hard turn into action sci-fi/fantasy... and yet he still puts in a mystery box.
** ''Series/{{Alias}}'' was [[DivorcedInstallment born from an idea]] that Abrams had for a PlotTwist in which it turned out that Felicity was a UsefulNotes/{{CIA}} agent all along. Creator/KeriRussell would one day [[Series/TheAmericans get to play a spy on TV]] -- and what's more, it would be a [[UsefulNotes/MoscowCentre KGB]] agent out to subvert America, not unlike how the FirstEpisodeTwist on ''Alias'' had Sydney Bristow find out that she was actually working for the bad guys.
** Keri Russell would eventually play a spy in a [[Film/MissionImpossibleIII J.J. Abrams project]].
** In the 12th episode, Sensa tells Felicity that she could make a lot of money if she sold her hair.
* NeverLiveItDown: The ImportantHaircut, which is the only thing many people remember about the show.
* RetroactiveRecognition: Creator/TarajiPHenson appears as an art student and one of Noel's fellow R.A.s in Season 1.
* UnnecessaryMakeover: General consensus towards the infamous haircut, since it was clearly done by someone inexperienced with cutting curly hair, and it looked rough and uneven. It didn't help that every other character kept going on about [[InformedAttribute how good it looked]].