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Despite London being gone, there's still parts of the city outside the blank hole where it used to be.
Nero isn't affected by the pillows when he's sleeping on them.
Apparently the snakes haven't seen (or eaten) anybody since the 1960s, hence the peace medallions and "groovy man.")
Dr Crumhorn usually has his name As "Dr Augustsus P. Crumhorn" but on this episode he says his name is "Alloicious Julian Illbert Elfinstone Eugene Dionysus Barry-Manillow Crumhorn."
Global Warming! Was that already tried in "Alping Is Snow Easy Matter?"
St. Martin's Theater: The Mouse Trap.
"The George Button"
Dangermouse: "The George button is for evading hostile Dragons."
(previous episode reference: "By George It's A Dragon")
'Mack The Fork' lifts up and looks at the phone book, pretty amazing considering he has no arms.
Running Gag: the line "Ee, by gum, he's a bad 'un."
The Narrator's full name is "Isenbahd Sinclair."
Stilletto's full name is Stiletto Mafiosa.
Jones the dragon names Baron Greenback as his "frog-father".
When Greenback tries to recruit an amnesiac DM to his side, the former convinces the latter that he is an outlaw known as the White Shadow.
Stiletto's original voice on the British telecasts was an Italian accent, but was changed to a Cockney accent for American TV to prevent offending Italian-Americans. As such, a good bit of his dialogue was changed.
In this episode, for example, after Danger Mouse suffers his amnesia infliction and sees Stilleto surrendering, the following exchange took place on the original British showing:
DM: Er...how do you do, Mister Surrendered.
Stiletto: Eh? Is this a British joke, signor?
On American TV, Stiletto's line was changed to "Don't you know who I am, gov?"
One of Penfold's lines sounds like it's been delivered by Brian Trueman.
At the end, when the camera zooms out on Big Leo, it's the same shot of the bird's eye view of DM looking up at King Leo earlier. But you can still see DM's image looking up at King Leo.
In this episode, we see DM with three hairs in some shots of this episode.
How did DM haul, Greenback, Nero, and Stilleto off to jail? The car is only a 2-seater!
On the back of the truck: Big Ben, The Taj Mahal, The Statue Of Liberty, The Tower Of Piza, and one undientifiable one.
Balloon over the ocean reads: AMERICA OR BUST. It pops and falls into the river.