I started watching this show because I liked Eliza when she was on Buffy. It is only because I find her likeable that I continued to watch it because the show was pretty ordinary.
But then Jack arrived and my perseverance paid off because all of a sudden the show gets much more interesting with Jason Priestly added to the cast. It is more than just his charisma. What the show really needed was an actual adversary for Tru. So Jack gives the show and the plots a nice kick in the pants.