During the high-dive sequence, background music from Scooby-Doo, Where Are You? can be heard.
When Dastardly took one of Muttley's medals, the other one had a different look but, when Dastardly tried to take the second one, it looked like the first one.
This episode was adapted into the comic book story "It's Flop And Go-Go" (Hanna-Barbera Fun-In #2, Gold Key, May 1970).
This episode was loosely adapted into the comic book story "The Chicken Flyboy" (Hanna-Barbera Fun-In #6, Gold Key, March 1971).
As Muttley is lowering Dastardly after the latest mishap, Dastardly tells him to slow up as they are 100 feet from the ground. Muttley says they are 500 feet from the ground (thanks to his glasses) and when he brings his hand up to show it, he gets a fifth digit.
When the show was syndicated as part of "The Funtastic World Of Hanna-Barbera" package in 1977, WANX/ch. 46 in Atlanta had the scene of Zilly being hypnotized and a later scene of Dastardly and Zilly being hypnotized cut out. WANX was then owned by Pat Robertson's CBN company and any presentation or reference to supernatural elements violated their programming standards. (WANX is now Atlanta's CBS affiliate WGCL.)
While Zilly was brave, he got irritated when Dastardly asked for him to translate what Klunk was saying.
After a call from the General, Dick hears a voice from the phone say - "This telephone will self-destruct in two seconds" before the phone explodes. This was a spoof from the then wildly popular Mission Impossible show.
"Stop That Pigeon" was the series' name while being developed, and during that time it did not have Dick Dastardly and Muttley. The leader of Vulture Squadron was a chubby, bespectacled, and heavy-jowled Red-Baron-type character and the dog was an orange dachshund in a pilot's goggles. It appeared that these two original characters weren't going anywhere regarding story development, so Dastardly and Muttley were plucked from "Wacky Races" to star. (Klunk and Zilly were part of the developmental scheme.)
This episode was adapted into the comic book story "Mission Impassable" (Hanna-Barbera Fun-In #1, Gold Key, Feb. 1970).
Muttley's Birthday is on the 5th of April. (As seen on the calendar is holding twice in this episode)
Why doesn't Dastardly use a parachute on a regular basis like in this episode instead of calling for Muttley's help?
This episode was loosely adapated into the comic book story "Command Performance" (Hanna-Barbera Fun-In #6, Gold Key, March 1971).
Muttley grunting as Dastardly intended to keep the furlough all for himself is a precedent for a recurring joke in Yogi's Treasure Hunt where Muttley usually bites Dastardly whenever he says the treasure will be all his.
While it's never determined which country the Vulture Squadron is from or on which side they are, Klunk's and Zilly's choices of places for vacation make us presume they were not enemies of the Americans as they hoped to be allowed to enjoy vacations in Miami or Hawaii. (Additional note: The show takes place during World War I, and Hawaii had not yet been established as a state, let alone a tourist's vacation paradise.)
Dick Dastardly's plane is red, Zilly's plane is green, and Klunk's plane is blue.
When Muttley attempts to catch the pigeon by flattening him with the anvil, he accidentally flattens Dastardly, Zilly and Klunk individually in each of their planes.
The sound waves of Dastardly's voice quoting, "Muttley, you'll lose your medals for this!" appears to be coming out of Zilly's flattened green plane instead of Dick Dastardly's flattened red plane.
This is the first time in the show that Dick gets a wrong number on the phone.
This episode was adapted into the comic book story "Feather Fuddle" (Hanna-Barbera Fun-In #1, Gold Key, Feb. 1970).