For all the mega Against the Grain fans out there, here is the full theme song, version #1 in all its glory. The part you are familiar with is in the middle of the track.
Produced and Written by Samir Kakodkar. Borrowed some parts from theme from the ABC reality TV show The Mole (that nobody watched). Circa 2003 at Northwestern University, Foster Walker Complex, on a microKorg and Garage Band.