Well, I'm sure that if you've watched the series, you know of the song, God Knows...

I've found the guitar parts, but what I need right now is the bass. If anyone could point me in the right direction, it would be much appreciated.

Here's a link to a Guitar Pro file for God Knows:

God Knows (http://www.911tabs.com/link/?3574293)

If you don't have Guitar Pro, you can get a trial version (lasts a month, I believe) here:

Guitar Pro Trial (http://www.guitar-pro.com/en/index.php)

Unfortunately, you can't print the tabs out with the trial version without having "Trial Version" stamped across your tabs. But, this is the only version of God Knows that I've come across on the internet that has the bass. If all else fails and you'd rather not drop the money to purchase Guitar Pro, you can always transfer the notes from the Guitar Pro file to something like Noteworthy or Finale. Might be a bit time consuming, though. :(

If that doesn't help, search the internet for a MIDI file of it and post a request in the MIDI request thread.