A quite complicated question here: I love the song, which is played in Club Canvas when Eric and Calleigh are there for the second time. I don't know which episode it is, and it's probably from the first season.
It's season 1: Forced Entry. I saw the episode yesterday too, but I can't remember what song was playing...do you have lyrics? Or what kind of song was it?
I wish Verizon wireless had it to where I could download the opening song to my cell. Had a friend of mine put all three songs from the 3 shows on cd for me but would love to have it as a ringtone & ringback tone.