From Mish Mash Missouri Dash: While Dick Dastardly was ordering Muttley to repair the Mean Machine, Muttley's head hair was black like his ears instead of brown like the rest of his fur.
From Mish Mash Missouri Dash: one shot shows the Army Surplus Special following the cars that didn't take the short cut and right after this Dick Dastardly notices the Army Surplus Special following them through the short cut.
When Peter Perfect pulls up at Grandma's house and sees the Compact Pussycat parked there, the rear tire on the far side of the Turbo Terrific in uncolored
Goof: one shot shows Dick Dastardly bare hands (without his red gloves).
When the car crash happens, the narrator names every car's number except #2, #5, and # 10, but everyone was in the crash except #5.
Two of Penelope Pitstop's buttons are removed and replaced by "Mud Pack" and "Bubble Bath"
When Penelope says "Oh my that is so soothing" Her lips do not move
Pvt. Meekly: Did you say left, Sarge?
Sgt. Blast: Right.
Pvt. Meekly: Oh, right.
Sgt. Blast: NOOO!
Dick Dastardly: So we won't take the left road, which is the right road. We will take the right road, which is the wrong road, right?
Narrator: A late start, Dastardly?
Dick Dastardly: Yes. *snicker* Last night I had Muttley here let the air out of the tires, and guess whose tires got it?
On the Cartoon Network and Boomerang showings of "Idaho-A-Go-Go" (as well as the Warner Home Video DVD), Muttley's snicker at the end is missing.
Both episodes were adapted into comic book stories in Gold Key issue #2 (February, 1971); "Idaho-A-Go-Go" was retitled "Wide Open Races" (and had a different ending).
Mish Mash Missouri Dash:
1st: #3 Convert-A-Car
2nd: #5 Compact Pussycat
3rd: #2 Creepy Coupe
1st: #1 Bouldermobile
2nd #10 Buzzwagon
3rd: #3 Convert-A-Car
(from Mish Mash Missouri Dash)
Announcer: Professor Pat Pending finds himself way up in the air...in that beautiful balloon!
This alludes to a line in the song Up, Up And Away by the Fifth Dimension. The line is actually "Way up in the air in my beautiful balloon."