I started watching Green Acres DVDs once a week from the beginning again starting about 2 years ago and now I've worked my way to the last season.
What I find most annoying about this last season is that NO ONE ever pays any attention to anything Oliver tries to say. He can ask a question, gets ignored, he can respond to the outrageous lies told about something he's supposedly done, gets ignored, he can start to make a statement even to formerly normal people like Mr Drucker and now even Drucker totally ignores everything Oliver says. They all pay rapt attention to lies Ebb says and everyone stops when Lisa spouts nonsense but anything Oliver says or questions is just ignored as if he wasn't there.
Really frustrating, I imagine it must have been even more frustrating for Oliver. He should have left Lisa behind in Hootersville and moved to Outer Mongolia, he probably would have had a better time communicating there.
Oliver The Invisible Man in The Last Season
. He can ask a question, gets ignored,
They all pay rapt attention to lies Ebb says
and everyone stops when Lisa spouts nonsense
but anything Oliver says or questions is just ignored as if he wasn't there. 
