This cartoon wasn't actually an "episode" of TMS, as such, since it didn't have a title. I think it was just an ad-break. If it were a real episode, then
the One With The Lab-Gogs (no, they didn't have -or need- names) would have got blown up, an event which occurred in every Mad Scientists episode, and which the One With The Glasses would be blissfully oblivious to.
Expect more "Mad Scientists" cartoons to come soon...