April 21st, 1982 - The final episode of "WKRP in Cincinnati" aired on CBS

And a great last episode it was.

Check out this blog (and the episode) from an old pal of SO- Jaime Weinman:

http://zvbxrpl.blogspot.com/2009/07/wkrp-episode-up-and-down-dial.html

Wow, it aired just one day before the birth of my sister. You really do learn something new every day!!!