JJ Abrams' second TV series, Alias, actually began while Felicity was still running. In fact, Felicity was the inspiration for Alias. Apparently, about halfway into the first season it occurred to him how much fun it would be if Felicity lived this secret life. Like she was a spy or something. But, there was no way to incorporate THAT into Felicity. So, the idea germinated and Alias was born. Sydney Bristow, played by Jennifer Garner (who made appearances on Felicity), actually was a spy attending graduate school. Voila. The idea manifested and was a HIT. Alias was one of those shows with talent up the wazoo, tons of action, an over-arcing mystery, and just Awesome. The show aired from 2001-2006.
Also the show had Michael Vartan, who played Michael Vaughn. Sidney and Vaughn were a HOT couple. Just steamin'.
Did you laugh when they realized they were on coms? That older guy was her dad. Can we say AWKWARD???