Continuity mistake: In the opening, when Oliver goes to grab Lisa's hand, he moves his left hand. When the camera looks at Lisa, Oliver is reaching with his right hand.
More mistakes in Green Acres
TV Kiddie Show Host: Sure, I remember that kid, he had on the most realistic looking pig costume I've ever seen. He won first prize.
Oliver Douglas: No, you don't understand, Arnold is a real PIG.
TV Kiddie Show Host: I'll say he is! We had five gallons of ice cream for those kids, and he ate every bit of it himself.
More trivia for Green Acres