The reason the original Ben 10 is labeled as "On The Air" is because the chumps at Cartoon Network decided to reboot the series last year, a clear case of fixing something that wasn't broken.
Ben 10 had been a profitable franchise for CN, such that the network decided they needed to make live-action movies spun from the series. You have to remember that this was around the time that now-deposed executive "Stupid" Stuart Snyder was in charge, and thought live-action would function as well on CN as it has on rivals Nickelodeon & Disney Channel. What a maroon!
The basics: 10 year old Ben Tennyson finds what he thinks is a fancy watch. What it really is, though, is the Omnitrix, which allows him to access the powers and abilities of 10 alien beings, hence the show's title, Ben 10. The Man of Action studio, which includes writers Joe Kelly & Steven T. Seagle, developed the series, but I am not entirely sure if they've been lured back to CN for the current series, which launched in October.
Ben 10 spawned three sequel series, all of which will be covered in due course. We would also see that Ben's cousin, Gwen, would discover that she herself is not only a sorceress in training, but half-alien as well.
Following is the intro:
The back & forth sniping between the cousins you can dismiss as being natural, the closest thing to sibling rivalry this show has. However, the bickering would give way to the formation of natural teamwork and bonding between Ben & Gwen, almost as if they should've been brother & sister instead of cousins. I haven't seen the new version yet, but that will also be addressed in due time.
Rating for the original Ben 10: A-.