Does anyone seen last night's episode of the "Golden Girls" on Lifetime? It ended with Blanche says goodbye to Sophia, Rose and Dorothy as she moved to a different place. I found a description from the Bill Cotter's "The Wonderful World of Disney Television" book. Here it is:

One Flew Out the Cuckoo's Nest
Guest starring: Leslie Nielsen

A practical joke takes an unexpected turn when Dorothy dates Blanche's uncle to make her jealous. Soon, everyone's surprise, Dorothy and Lucas announce their engagement.

Airdates (1-hour format): 5/9/92, 9/12/92

They've aired it numerous times, both in the original hour-long format and the syndicated Part 1/Part 2 format.