24 is another one that was at the right time, although the big one was not under their control. It started showing 2 months after the 9/11 attacks. More to the general point, it was also at the time that computers and internet usage was fast growing, but gaps in the digital side meant it was still plausible that field agents were important. They also had plot lines such as the bad guys using online video game chat (a smaller but growing thing in the early 2000s) as a hidden communication channel which I believe is pulled from real events.