Season 2 intro

Was the intro sequence changed in any way for the second and later seasons? And I mean the episode clips used, not the music - because I've been watching the entire series (which I haven't seen since it aired here in the early 90's) and whenever I come across a familiar clip, it comes back to me, but I don't actually ever remember seeing any of these episodes before.

The clips in question are;
-Microducks From Outer Space (giant ant on Scrooge's desk, Scrooge and the boys sliding down the phone cord to the shaggy carpet=
-Scrooge falling down a money whirlpool in "Earth Quack"

I don't know if there are others, but the first episodes I actually remember watching as a kid was the season 2 opening five-parter.