I'm 34. I saw the original GI Joe and Transformers. And was present during the toy store raids of 83 and 84. (even had a table collapse in front of me in a toy store and grabbed them from in between adults legs while they went crazy fighting over them).
In any case...
The Vindow Viper episode was about the GI Joe team relaxing in some new clubhouse they had built, whent hey get a mysterious call from a guy with a strange accent saying he is coming to 'vipe the vindows' and gives details. The GI Joe team, thinking it some code, brainstorm, and figure it is a informant giving them cobra secrets, use the 'info', and it turns out right.
A later call by the same guy gives them the same message, in a slightly different manner, and they figure it a raid this time, and it also turns out correct.
At this point, the supposed leak is learned by Cobra high command, and they themselves are upset and want the 'informant' found.
Another call, stating the guy would be their shortly, and all the Joes mobilize, waiting for some army or attack at their clubhouse. And who shows, some old geezer with a bucket 'The Vindow Viper' and he 'came to vipe the vindows'.
The episode was 'Season 1', titled: 'The Viper is Coming'. One site I found said it was episode 29.
I did manage to find it by bittorrent. Downloading now.
Well, as rusty as my Korean is, I'd say that the first few are just sound effects followed by something that looks like "follow." The only thing I'm really certain of is the last picture when they kiss, right there they say "I love you."