It's as science fiction show that aired last year on Showtime in the US. It's produced
by J. Michael Straczinski, the same guy that was responsible for Babylon 5, and has a similar spiritual/thoughtful cast to its sci-fi elements.
The basic premise is that a plague called the Great Death wiped out all adults 15 years ago, and the children have been struggling to survive and pick up the pieces. The title character's father some some government position, and hinted that he would try to get to someplace called "Valhalla Sector" to survive. Jeremiah is looking for that place to find out what happened to his father.
The Jimmy channel is showing it Fridays at 8:45 right now (VO, subtitled), but they're already 8 episones into the first season. Hopefully they'll rebroadcast it from the beginning at least once.
--Ben