Continuity: When Jethro and Granny run out to the pool and see Elly May seated on the rhino, Granny tells Jethro to give it mouth-to-mouth. The camera cuts to a closeup of the rhino opening its mouth and growling, and it's clear that Elly May isn't on its back. In the next shot, she's back on its back again.
During the filming of this episode, the hippo wouldn't go into the two-foot deep swimming pool until the elephant it was in love with tried it first, but once they were both in it,they began relieving themselves in it. It cost the crew time to skim and clean it, resulting in the pool water looking dark in this episode. When Donna Douglas noticed it, director Joe DePew lied to her about the animals going in it and claimed he had dyed the water so it would look like the hippo was swimming as she rode it. When she later learned the truth, she smacked him across the shoulders.
In this episode, Jed teaches Yerko the theme and lyrics of "The Crawdad Song," better known as the theme to "The Andy Griffith Show" by Earle Hagen, who whistled the tune for that show's opening theme.
The scene with John Wayne was a last minute addition to the episode. Buddy Ebsen was friends with John Wayne and invited him to do the walk-on.
In this episode, Granny has never heard of penicillin, but in an episode before this, she mentioned it.
The Mayor is using a 1914 Ford Model "T" Fire Engine as his official vehicle...
Although the logo is obscured by a red bar, the familliar green stylized rooster and logotype can be seen on the box of Kellogg's Corn Flakes that Jethro is eating from in the first scene. Kellogg's was the main sponser of The Beverly Hillbillies, and the characters (especially "six-foot stomach" Jethro) were often seen eating the cereal, both in commercials and in the storyline.
As Jethro, Elly Mae, Granny and Jed sit at the kitchen table, two boxes of Kellogg's Corn Flakes are shown between Jethro and Elly. In the wide shot, both boxes face front towards Elly. When the camera switches to a two-shot of Jethro and Elly, the box closest to Elly is faced backwards towards her.
Jed says how Granny has always commented that Granny always says how she looks just like the great Gloria Swanson. However, this is the first and only time she mentions it on the whole series.
We learn that Granny is 77 years old when Elly wishes that she could have that much fun when she gets to be Granny's age, meaning Granny was born in about November 1889.
When Drysdale and Jane try to stop the Clampetts from making a campaign speech in front of the bank, the Clampetts mention Drysdale's bib and he must be eating spaghetti. But when they get the Italian maid in a later episode, Granny thinks the spaghetti Jethro is eating is cooked string.
If you look closer, the wood Herbie is splitting is pre-cut. He's just using the axe to break it apart along a seam.
In this episode, Tom Kelly doesn't show much knowledge of real gorillas, only about Hollywood's depiction of gorillas. In the wild, real gorillas are not nearly as vicious. They only use their strength when they think they are being attacked.
Elly loves animals and generally knows more about them than the family, so why didn't she know what a gorilla is?
When Jed first acquired his movie studio, Dash Riprock mistook Miss Jane as Elly, and Miss Jane was falling for the actor. But in this episode, Jane cannot stand the playboy Dash. Why did her outlook on the actor change in a short time?
The clip of Granny looking at the camera and saying "Hello out there in Television Land" was used by TVLand in a promo when the cable station first aquired the broadcast rights to the series in 2000.
When the Clampetts head down to the bank, they're shown driving on a Beverly Hills street, but apparantly the footage shown was flipped because both Jethro and the steering wheel are on the right side of the truck instead of on the left. When they finally arrive at the bank, Jethro and the steering wheel are on the left side of the truck.
Goof: When Granny runs in the house, looking for Jethro, she is wearing a blue top. But when she runs towards the parlor to get Jethro, she is in a white top. After Jethro closes the doors and Granny runs into them, she stumbles back and has the blue shirt on again.
As Max Baer recalls, in the filming of this episode, the jack lifting the truck to make it look like it was flying slipped and the truck tipped over nearly landing on Buddy Ebsen; Max was the only thing holding it up as the crew helped him. Buddy Ebsen wasn't aware of what had occurred until he saw the footage.
Jed tries to think of someone from the hills who would recall how old Granny is. In the 1981 TV-Movie, "The Return of the Beverly Hillbillies," it was revealed that Granny's mother, played by Imogene Coca, was still alive.