As those of you who know me, I am a big fan of espionage stories -- but since the fall of the Soviet Union and 9/11, there has been quite a shift in stories of that genre. I can find occasional TV series like MI-5 and I know about, but have never watched the popular Alias TV series and its excuse for looking at Jennifer Garner...
Recently, I started viewing Sleeper Cell on ShowTime and I like it a lot. It's timely, informative and scary. Timely as in you occasionally hear about the concept of a sleeper cell in the USA -- usually from some of the more alarmist news outlets. Informative in the sense that in addition to intrigue there is a lot of background on the motivation behind terrorist attacks. Scary in that it isn't too hard to imagine something like this happening. Of course it is a bit over the top, and that is to be expected for any television drama.
One of the things I also liked is that it is messy -- i.e., it is like real life. Not everything works out. The operations frequently fall apart as they would in real life.
In any case, if you get a chance to view this, give it a shot.