Zack & Lisa Chemistry....
It's so funny...now that I'm older and know the "background stories" of the cast, when I watch this show now, it's so clear and obvious to me now that something was definitely going on between Zack (Mark) and Lisa (Lark) behind the scenes. (Hehehe....Mark & Lark lol...cute)
I don't know why I never really picked up on it Before. Maybe I was too blinded by the Zack and Kelly romance to see anything else. Or maybe I was just too young at the time to pick up on the subtle clues, but now watching as a grown adult, the signs are obvious that they liked each other and were dating off-screen.
I can tell just by the way Zack would look at Lisa, and interact with her. They had a familiar-ness together that transpired on-screen. It was definitely a different vibe than the one I would get with Zack and Kelly. I can't explain it. Too bad the episode where Zack and Lisa got together only lasted about an episode or two. They dated for quite some time off-camera. They were too sweet. :)
It's pretty obvious when you look at old episodes now. Zack and Lisa definitely had better chemistry together, but their stories were never really written for romance in mind, so that's probably why most people probably don't pick up on it much. But look at the way Zack looks at Lisa when the attention isn't on him. It's pretty obvious he likes her lol.