It seems like in the foursome, Barnabas, Burke, Vickie, Julia, only one person doesn't know what is going on. That is Vickie. Barnabas Likes Vickie in a romanic way, Barnabas puts up with Julia grugingly, Hates Burke. Burke Loves Vickie, hates Barnabas, is weary of Julia, Vickie Loves Burke, is open and friendly with Julia, likes Barnabas as friend. Julia cares for Barnabs and wants to use him to get to a goal: wants to protect Vickie from Barnabas, and protect her interest. Wants to use Burke to help her in her goals to keep Vickie away from Banabas. I think Barnabas and Julia are the most calculating. Vickie and Burke, don't realize wht the other two are.
Maybe that is why Julia and Barnabas stayed on they were more interesting. The JF and GH that played them put more into them so they would be interesting. I think people had more interest in what Julia and Barnabas would do. The trials between Julia and Barnabas are now what is making the show interesting.
I have one question why didn't Barnabas just appear in Vickie's room. Maybe they wanted to build the suspense maybe he would get caught. If Barnabas Zapped Vickie then would that have put the experiment back??