So if Denton was as messed up as it was in Shock Treatment, why did Brad and Janet not like the space castle from RHPS more? It seemed friendlier, even with the murder thing--but that's just was happens at castle dinner parties.
From what I read, Shock Treatment was not necessarily a sequel in the 'standard' sense; just a different plot with the same characters (I think I read that Richard 'O Brian said that)