Mr. Feeny: This world of yours seems like quite a peaceful and loving place!
Topanga: Yes! Especially since we've moved all men underground and use them just for breeding.
Mr. Feeny: Well, just a few moments ago Mr. Minkus mentioned that you were his lovely wife.
Topanga: Stuart and I do not see eye-to-eye on our futures.
Minkus: We're married!
Topanga: You're breeding stock!
Minkus: I'll take it!
The sign at the class reunion says "Welcome Back Class of 2000". Chronologically, they should have graduated in 2000 but instead, they graduated in a 1998 episode.