This is the first appearence of Professor Norton Nimnul.
In the scene in the Screaming Eagle we hear Chip telling Gadget that "hitching a ride on an airliner was a swell idea". However, Dale is the one who is mouthing the words while Chip's mouth doesn't open.
Gadget: I'll have this plane ship shape in no time. Well, actually it should be plane shaped, shouldn't it?
Gadget: Hi there, I'm Gadget. Oh, you know that already... hmmm... What comes next? Oh, what's your name?
This episode was released on Chip 'N' Dale Rescue Rangers Volume Two.
This is the only time Geegaw Hackwrench, Gadget's father, is mentioned.
In terms of continuity,this is Gadget's first appearence.