This was one of my favorite shows growing up. I loved the action, the humor and Rockapella. I sang along with the theme song every time!
The show itself involved chasing thieves around the world and culminated in the apprehension (or failed attempt at apprehension, in most cases) of master criminal, Carmen Sandiego. The show was fast paced and colorful and was able to hold my attention for 30 minutes every day after school. I remember yelling at the tv when the contestants were unable to find Buenas Aires on the giant map in the final round.
It is a shame it is no longer running.