The first episode filmed in color.
Just before the fourth season got underway, Mrs. Kirkeby apparently broke the agreement her late husband had made with Filmways Productions, since the mansion's address was leaked and caused an endless stream of tourists to come to the mansion looking for Jed and Granny. Filmways was not allowed to film the mansion's exterior or film any long shots of the mansion grounds after that.
The #6 ship seen at 11:53, is the USS Providence (CLG-6)
Jed Clampett wears the uniform of a Vice Admiral.
Jethro Bodine (Max Baer, Jr) reads the ship's cost estimates to Uncle Jed Clampett (Buddy Ebsen). The ship costs $6,000.00 a day to operate, uses 500 gallons of oil every hour, its 250 crew eat 600 pound of food a day, and it costs $3,000,000.00.