The supercharged locomotive that is now "standard equipment" on the C&FW Railroad, as shown in their office, is a model of a Santa Fe E1A locomotive, built 1937-1938. The model is even in Santa Fe paint, with a small "C&FW Railroad" sticker over the Indian head logo used on the side of the locomotive. At 25 years of age, it's not a very new locomotive for a railroad that is supposed to be "modern and progressive".
Charles Lane is the Scrooge Homer Bedloe in this episode. He guest starred on "Bewitched" as the Scrooge Jesse Mortimer in the fourth season episode "Humbug Not to be Spoken Here".
Fred Clark played Bea Benadaret's husband Harry Morton on "The George Burns & Gracie Allen Show" from 1951-1953.
When they're trying to do the play, and Dog is missing, when he comes back, you can hear Billie Jo say "Higgins" followed by Betty Jo saying "You've come back". Higgins is Dog's real name.
Kate calls Betty Jo by her full name on this episode, Elizabeth Josephine Bradley.
Floyd recites a line from the movie "Reunion in Hackensack". An internet search shows no such movie with that title.
Eustace Pockle is mentioned in this episode as shoplifting again. In the 4th season, there would be an episode centering around him: "Shoplifter at the Shady Rest"
The nighttime shots of the Cannonball (when the kids are on the "all night party" train), look like a model train, rather than the real train.
When the Cannonball breaks through the "Welcome, Hooterville Cannonball" sign, it looks like a model train, rather than a real train.
The distant footage of Homer Bedloe running the handcar is in black and white. Most likely the footage came from the first two seasons, when the show was black and white.
Near the beginning of the episode, when it shows the Cannonball uncoupling from the car, after it pulls away from the car, part of the footage is run in reverse, as you can see the smoke going into the smokestack.
Rufe Davis (Floyd) gets to show off his talent for doing sound effects on this episode, at the party.
A big deal is made by Steve over his falling for Betty Jo when he was supposedly "going steady" with Billie Jo. He hasn't dated Billie Jo since "The Eternal Rectangle", and it was reiterated that they were just friends now in "It's Not Easy To Be A Mother". Most likely, this episode was scripted before those, and corrections weren't made nor noticed during filming.
Editors reply: He fell for Betty Joe (and she fell for him) in the previously aired episode "You Know I Can't Hear You When the Thunder is Clapping" after they landed the plane in the thunderstorm.
A reference is made to Uncle Joe not being able to stop the Cannonball and running into the Pixley depot. This happened on the 4th season episode "The Rise and Fall of a Tycoon"
Burt Mustin plays Grandpa in this episode, although it's not specifically stated whether he is Grandpa Miller, or Grandpa Jenson (as he appeared in several other episodes). A mention is made of Grandpa Miller getting the coffee and doughnuts though. He plays the same exact role as Grandpa Miller, complete with hard of hearing and playing the cymbals in the Hooterville Volunteer Firefighter Band.
A close-up of Steve and Betty Jo's marriage certificate is shown in this episode, and shows the date as June 7, 1967.
Betty Jo mentions she was the one who found Dog and brought him home. This happened in the first episode of the 2nd season "Betty Jo's Dog"
At the beginning, when Dog is chasing the train, the footage is the same footage used on the closing credits, although it's a bit longer.
Uncle Joe says he hasn't fouled things up this bad since he ran the Cannonball into the Pixley depot. That happened on the 4th season episode "The Rise and Fall of a Tycoon"
Owen Bush is credited as "Chauffer", which is actually the wrong spelling. It's spelled correctly in the guest list for this episode.