A fun episode with a great ending.  It is interesting to note how our culture changes.  Helen was investigated for assault because she scratched a guy's eye after he would not take no for an answer.  Nowadays I think she would, correctly, be depicted as the victim, not the aggressor.  Was Helen supposed to be under the influence of Kitty at that point?  Is there any doubt that the supernatural was involved, or is it possible that Kitty was simply mentally ill and had a weird knack of influencing cats?  

Was Kitty supposed to be the human incarnation of the cat?  If so, why did she ask the cat for assistance near the end of the episode?

All in all, I kind of felt sorry for Kitty.  She was trying to help her sister!